gistfile1.txt

function load_main($view = '', $view_data = array(), $return = FALSE)
{
	$this->set('nav_list', array('Home', 'Photos', 'About', 'Contact'));
	$this->load('template', $view, $view_data, $return);
        // $this->load('template2' $view, $view_data, $return);


}
Corresponding code in your controller:

$this->template->set('nav', 'About');
$this->template->set('title', 'About me');
$this->template->load_main('about');
// $this->template->load_main('about2');