Now i will explain how to send email html template using codeigniter framework
Now we will create a sample html template using html as below.Sample.php

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Welcome Message</title>
</head>
<body>
<center>
<table width="600" background="#FFFFFF" style="text-align:left;" cellpadding="0" cellspacing="0">
<tr>
	<td height="18" width="31" style="border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="18" width="131">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="18" width="466" style="border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
</tr>
<tr>
	<td height="2" width="31" style="border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="2" width="131">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="2" width="466" style="border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
</tr>
<!--GREEN STRIPE-->
<tr>
	<td background="<?php echo base_url();?>images/greenback.gif" width="31" bgcolor="#45a853" style="border-top:1px solid #FFF; border-bottom:1px solid #FFF;" height="113">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	
	<!--WHITE TEXT AREA-->
	<td width="131" bgcolor="#FFFFFF" style="border-top:1px solid #FFF; text-align:center;" height="113" valign="middle">
	<span style="font-size:25px; font-family:Trebuchet MS, Verdana, Arial; color:#2e8a3b;">Success!</span>
	</td>
	
	<!--GREEN TEXT AREA-->
	<td background="<?php echo base_url();?>images/greenback.gif" bgcolor="#45a853" style="border-top:1px solid #FFF; border-bottom:1px solid #FFF; padding-left:15px;" height="113">
	<span style="color:#FFFFFF; font-size:18px; font-family:Trebuchet MS, Verdana, Arial;">User Enquiry.</span>
	</td>
</tr>

<!--DOUBLE BORDERS BOTTOM-->
<tr>
	<td height="3" width="31" style="border-top:1px solid #e4e4e4; border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="3" width="131">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
	<td height="3" style="border-top:1px solid #e4e4e4; border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
</tr>
<tr>
	<td colspan="3">
	<!--CONTENT STARTS HERE-->
	<br />
	<br />
	<table cellpadding="0" cellspacing="0">
	<tr>
	<td width="15"><div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
</td>
	<td width="325" style="padding-right:10px; font-family:Trebuchet MS, Verdana, Arial; font-size:12px;" valign="top">
	<span style="font-family:Trebuchet MS, Verdana, Arial; font-size:17px; font-weight:bold;">Dear Adim,</span>
	<br />
	<p>  <?php echo $firstname;?></p>
    <p> <?php echo $mail;?></p>
	<br />
	<div ><?php echo $body;?></div>

	<!--<div style="padding-left:20px; padding-bottom:10px;"><img src="images/spade.gif" alt=""/>&nbsp;&nbsp;&nbsp;Benefit of receiving email (#2)</div>
	<div style="padding-left:20px; padding-bottom:10px;"><img src="images/spade.gif" alt=""/>&nbsp;&nbsp;&nbsp;Benefit of receiving email (#3)</div>-->

	<p>In the meantime, you can <a href="http://eknowledgetree.com/">return to my website</a> to continue browsing.</p>

   Best Regards,<br/>
  <?php echo $firstname;?>.<br/>

  eknowledgetree.com .<br/>
   <br/>

   This welcome email was sent to you because you recently signed up for <a href="http://eknowledgetree.com/">eknowledgetree.com</a>.

	</td>
	<td style="border-left:1px solid #e4e4e4; padding-left:15px;" valign="top">
	
	<!--RIGHT COLUMN FIRST BOX-->
	<table width="100%" cellpadding="0" cellspacing="0" style="border-bottom:1px solid #e4e4e4; font-family:Trebuchet MS, Verdana, Arial; font-size:12px;">
	<tr>
	<td>
	<div style="font-family:Trebuchet MS, Verdana, Arial; font-size:17px; font-weight:bold; padding-bottom:10px;">Add Us To Your Address Book</div>
	<img src="<?php echo base_url();?>images/addressbook.gif" align="right" style="padding-left:10px; padding-top:10px; padding-bottom:10px;" alt=""/>
	<p>To help ensure that you receive all email messages consistently in your inbox with images displayed, please add this address to your address book or supports list: <strong><a href="mailto:[email protected]">[email protected]</a></strong>.</p>
	<br />	</td>
	</tr>
	</table>
	
	<!--RIGHT COLUMN SECOND BOX-->
	<br />
	<table width="100%" cellpadding="0" cellspacing="0" style="border-bottom:1px solid #e4e4e4; font-family:Trebuchet MS, Verdana, Arial; font-size:12px;">
	<tr>
	<td>
	<div style="font-family:Trebuchet MS, Verdana, Arial; font-size:17px; font-weight:bold; padding-bottom:10px;">Have Any Questions?</div>
	<img src="<?php echo base_url();?>images/penpaper.gif" align="right" style="padding-left:10px; padding-top:10px; padding-bottom:10px;" alt=""/>
	<p>Don't hesitate to hit the reply button to any of the messages you receive.</p>
	<br />
	</td>
	</tr>
	</table>
	
	<!--RIGHT COLUMN THIRD BOX-->
	<br />
	<table cellpadding="0" width="100%" cellspacing="0" style="font-family:Trebuchet MS, Verdana, Arial; font-size:12px;">
	<tr>
	<td>
	<div style="font-family:Trebuchet MS, Verdana, Arial; font-size:17px; font-weight:bold; padding-bottom:10px;">Have A Topic Idea?</div>
	<img src="<?php echo base_url();?>images/lightbulb.gif" align="right" style="padding-left:10px; padding-top:10px; padding-bottom:10px;" alt=""/>
	<p>I'd love to hear it! Just reply any time and let me know what topics you'd like to know more about.</p>

	<br />
	</td>
	</tr>
	</table>
	
	</td>
	</tr>
	</table>
	</td>
</tr>
</table>
<br />
<table cellpadding="0" style="border-top:1px solid #e4e4e4; text-align:center; font-family:Trebuchet MS, Verdana, Arial; font-size:12px;" cellspacing="0" width="600">
<tr>
	<td height="2" style="border-bottom:1px solid #e4e4e4;">
	<div style="line-height: 0px; font-size: 1px; position: absolute;">&nbsp;</div>
	</td>
</tr>
	<td style="font-family:Trebuchet MS, Verdana, Arial; font-size:12px;">
	<br />
	 <strong><a href="mailto:[email protected]">[email protected]</a></strong><br />
	
	</td>
</tr>
</table>
</center>
</body>
</html>

Now we will create a controller class to call send mail function .
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<?php   
if (!defined('BASEPATH')) exit('No direct script access allowed');
?>
<?php
class User extends CI_Controller {
public $data;
	public function __construct()
	{
	//Core controller constructor
	parent::__construct();
	$this->load->model('user/user_service');
	
	}

Public function send_email()
{
$data= $this->user_service->send_htmltemp();
If($data)
{
  $this->session->set_flashdata('message',' Submitted Successfully');		
		
  $this->settemplate->usertemp('user/Success',$data);

}
Else
{
$this->settemplate->usertemp('user/contact_us',$data);
}
}
}

Now we will write send_htmltemp function in model class to send email template when
User submit the contactus form in frontend.

<?php
class User_service extends CI_Model
 {
 public function __construct()
	{
		parent:: __construct();
		
	}
public function send_htmltemp()
	{
	
	    $this->load->library('form_validation');
		//$this->form_validation->set_rules('username', 'Username', 'required|min_length[5]|max_length[12]|xss_clean|trim');
		$this->form_validation->set_rules('txtEmail','emailId','required|valid_email|xss_clean|trim');
		//$this->form_validation->set_rules('txtName','Name','required|xss_clean|trim');

		if ($this->form_validation->run() == FALSE)
		{	
		   $this->settemplate->usertemp('user/contact_us',$this->data);
		}//if
		else
		{
		 
		    
                                       $sender_mail = '[email protected]';
                                       $data['mail']=$this->input->post('txtEmail');
                                       $data['firstname']=$this->input->post('txtName');			$data['body']=$this->input->post('txtdescription');
				$this->load->library('email');
				$config = array(
						  'mailtype' => 'html',
						  'charset'  => 'utf-8',
						  'priority' => '1'
						   );
				$this->email->initialize($config);
				$this->email->from($sender_mail,'User Enquiry ');
				$this->email->to($sender_mail);
				$this->email->subject('eKnowledgetree Enquiry Form');
				$emaildescription=$this->load->view('user/sampletemplate',$data,TRUE);
				$this->email->message($emaildescription);
				$result=$this->email->send();   
		                        Return $result;
		 
		}
	}

}

[/wp-like-lock]
By using this function we send any html template to user emails.

Thanks for reading this article.