public function select($label = 'Categoria', $groupSlug = '', $model = '')
 {
     if ($groupSlug == '') {
         dd('groupSlug indefinido');
     }
     $categories = Category::where('group_slug', $groupSlug)->get()->lists('name', 'id');
     $currentCategory = $model != '' ? $model->category_id : null;
     $currentCategory = Input::get('category_id') ?: null;
     $html = Form::control('select', 'category_id', $label, $currentCategory, [], $categories);
     return $html;
 }
 /**
  * Define your module's route model bindings, pattern filters, etc.
  *
  * @param  \Illuminate\Routing\Router $router
  * @return void
  */
 public function boot(Router $router)
 {
     parent::boot($router);
     $router->bind('categories', function ($id) {
         $category = Category::find($id);
         if (!$category) {
             abort(404);
         }
         return $category;
     });
 }