'product_cat', 'show_option_all' => esc_attr__('All Categories','wp-commerce'), 'class' => 'form-control', 'name' => 'product_cat', 'value_field' => 'slug', 'id' => 'exampleFormControlSelect1', 'selected' => isset($_GET['product_cat'])?$_GET['product_cat']:'', ); wp_dropdown_categories( $args ); } ?>