It may be too late, but one possible way is to use namespaces. here is my example: routes.php:
Route::group(array('prefix' => 'admin' , 'before' => 'admin' ), function() { Route::controller('contacts' , '\backend\ContactController'); ... }
and on top of your backend controllers add the following lines:
namespace backend; use \view as view;
and also add these lines to your composers.json in the classmap directive:
"app/controllers/backend", "app/controllers/front",
source share