Call a controller from a Model

[eluser]Alface[/eluser]
First I need to know, I know MVC.
I realy need to do it.

Code:

<?php
class Site extends Controller {
    function Site(){
        parent::Controller();
    }

    function say(){
             echo 'hello';
        }
}

Code:

<?php
class Something_model extends Model {

    public function __construct(){
        parent::Model();
    }
    
    function dolikecontroller(){
        // something to call 'say' function from controller
    }
}

There is no libary extention for do it?

Thanks