Header and footer in CodeIgniter

Here’s what I do:

<?php

/**
 * /application/core/MY_Loader.php
 *
 */
class MY_Loader extends CI_Loader {
    public function template($template_name, $vars = array(), $return = FALSE)
    {
        $content  = $this->view('templates/header', $vars, $return);
        $content .= $this->view($template_name, $vars, $return);
        $content .= $this->view('templates/footer', $vars, $return);

        if ($return)
        {
            return $content;
        }
    }
}

For CI 3.x:

class MY_Loader extends CI_Loader {
    public function template($template_name, $vars = array(), $return = FALSE)
    {
        if($return):
        $content  = $this->view('templates/header', $vars, $return);
        $content .= $this->view($template_name, $vars, $return);
        $content .= $this->view('templates/footer', $vars, $return);

        return $content;
    else:
        $this->view('templates/header', $vars);
        $this->view($template_name, $vars);
        $this->view('templates/footer', $vars);
    endif;
    }
}

Then, in your controller, this is all you have to do:

<?php
$this->load->template('body');