add_filter( 'nav_menu_submenu_css_class', 'some_function', 10, 3 ); function some_function( $classes, $args, $depth ){ foreach ( $classes as $key => $class ) { if ( $class == 'sub-menu' ) { $classes[ $key ] = 'my-sub-menu'; } } return $classes; }
Quelle: https://stackoverflow.com/questions/5034826/wp-nav-menu-change-sub-menu-class-name