Split controller

I found a solution: custom libraries...
In my Page.php controller I have now:
...
public function houses() {
$this->load->library('HousesLib');
$this->houseslib->index();
}
...
And I have a library file HouseLib.php with this:
class HousesLib {
public function index() {
$CI = & get_instance();
$CI->load->library('session');
if ($CI->session->userdata('is_logged_in')) {
$CI->load->model('Houses');
......