....

~dev_rating/application/classes/Controller/Handler/Rating.php

@@ -39,7 +39,7 @@ class Controller_Handler_Rating extends Controller_Handler {
                 
                 $SG_json[$this->post->offsetGet('disciplineID')] = $this->post->offsetGet('groupSelected');
 
-                Cookie::set('SGID', json_encode($SG_json), '3600'); 
+                Cookie::set('SGID', json_encode($SG_json), '2592000'); 
                 $data['success'] = true;
             }
             $this->response->body(json_encode($data));