Ticket #29463: filter-wp_nav_menu-widgets.2.diff

src/wp-includes/default-widgets.php

@@ -1323 +1323 @@
                 if ( !empty($instance['title']) )
                         echo $args['before_title'] . $instance['title'] . $args['after_title'];
 
-                wp_nav_menu( array( 'fallback_cb' => '', 'menu' => $nav_menu ) );
+                /**
+                 * Filter the arguments for the Custom Menu widget.
+                 *
+                 * @since 4.1.0
+                 *
+                 * @see wp_nav_menu()
+                 *
+                 * @param array $args An array of arguments to retrieve the custom menu.
+                 */
+                wp_nav_menu( apply_filters( 'widget_nav_menu_args', array(
+                        'fallback_cb' => '',
+                        'menu'        => $nav_menu
+                ) ) );
 
                 echo $args['after_widget'];
         }