public function UserConstants(){
    $constants = get_defined_constants(true)['user'];
    $AL = new ArrayList();
    foreach($constants as $key => $val){
      $AL->push(new ArrayData(array('key' => $key,
                                    'val' => $val)));
    }
    return $AL;
  }


<% loop $UserConstants %>
   <p>$key - $val</p>
<% end_loop %>