Missing Method in GalleriesController

Error: The action cat: is not defined in controller GalleriesController

Error: Create GalleriesController::cat:() in file: app/controllers/galleries_controller.php.

<?php
class GalleriesController extends AppController {

	var $name = 'Galleries';


	function cat:() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp.