<?php
class MY_Controller extends CI_Controller
{
public function __construct() 
{
    parent::__construct();
    // if (!$this->session->userdata('staging_logged_in')) {
    //     redirect('staginglogin');
    // }
    if ( ! $this->session->userdata('logged_in'))
    { 
        // Allow some methods?
        $allowed = array(
        'some_method_in_this_controller',
        'other_method_in_this_controller',
        );
        if ( ! in_array($this->router->fetch_method(), $allowed))
        {
            redirect('superadmin');
        }
    }
} 

}

?>