Laravel 4.1 Request::is for active menu not working

I'm trying to make a menu active depending on route in laravel 4.1, my attempt:

<li
   {{{ (Request::is('/core') ? 'class="active"' : '') }}}><a href="{{{ URL::to('/core') }}}">Control Panel</a>
</li>

My route:

 Route::get('/core', 'CoreController@Showindex');

This is not throwing any errors just simply ignored. any help is appreciated.