Ticket #16724: current-menu-item-custom-link-path.diff

wp-includes/nav-menu-template.php

@@ -360 +360 @@
 
                 // if the menu item corresponds to the currently-requested URL
                 } elseif ( 'custom' == $menu_item->object ) {
-                        $current_url = untrailingslashit( ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
                         $item_url = untrailingslashit( strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url );
+                        if ( 0 === strpos( $item_url, '/' ) )
+                                $item_url = untrailingslashit( ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] ) . $item_url;
+
+                        $current_url = untrailingslashit( ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
                         $_indexless_current = untrailingslashit( preg_replace( '/index.php$/', '', $current_url ) );
 
                         if ( in_array( $item_url, array( $current_url, $_indexless_current ) ) ) {