{!! Form::select('products[]', $products, [] , ['class' => 'form-control input-sm blog_post_products', 'multiple', 'style' => 'width:100%;']) !!}

{!! Form::select('productGroups', $productGroups, '' , ['class' => 'form-control input-sm blog_post_product_group', 'style' => 'width:100%;']) !!}

{!! Form::select('productCategory', $productCategories, '' , ['class' => 'form-control input-sm blog_post_product_category', 'style' => 'width:100%;']) !!}