Abort execution and call _output() method

[eluser]Hank the Punk[/eluser]
Hello.

In the controller constructor i'm calling a function in the user model like this schema:

Code:

class Some_class extends CI_Controller
{
public function __construct()
{
  parent::__construct();
  // Stuff to load user model
  $this->user->check_permission();
}

public function index()
{
  // Do whatever...
}
}

Code:

function check_permission()
{  
if (! $this->is_registered())
{
  redirect('members/login', 'refresh');
  die('Youre not logged'); // Case of error
}

if (! $this->has_access_to_controller())
{
  redirect('error403', 'refresh');
  die('Access denied');
}
}

Instead of using redirect methods, can I load some views and then bypass the execution of the current controller (for instance the index() method) and execute the _output method ?? Something like this:

Code:

function check_permission()
{  
if (! $this->is_registered())
{
  $this->load->view('login');
  call_controller_output() // echoes whatever
  exit(); // Bypass index() method in controller
}

if (! $this->has_access_to_controller())
{
  $this->load->view('denied');
  call_controller_output() // echoes whatever
  exit(); // Bypass index() method in controller
}
}

Thanks !!!