我正在处理一个项目，我希望wp\\u nav\\u菜单为当前页面、当前祖先输出其他css类，并删除其他内容，如页面id和menu-id。

我已经做了一些工作，比如使用自定义助行器删除不必要的类和id:s。但我无法让当前的\\u祖先更改为其他类。

以下是我到目前为止的想法：

class Clean_Walker extends Walker_Nav_Menu 
{

    /**
     * @see Walker::start_el()
     * @since 3.0.0
     *
     * @param string $output Passed by reference. Used to append additional content.
     * @param object $item Menu item data object.
     * @param int $depth Depth of menu item. Used for padding.
     * @param int $current_page Menu item ID.
     * @param object $args
     */

    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) 
    {
        global $wp_query;

        $class_names = $value = \'\';

        $classes[] = ( $item->current ) ? \'sel\' : \'\';


        // $current_classes = array(
        //     \'current-menu-item\',
        //     \'current-menu-parent\',
        //     \'current-menu-ancestor\',
        //     \'current_page_item\',
        //     \'current_page_parent\',
        //     \'current_page_ancestor\'
        // );

        // foreach ($current_classes as $current_class )
        //  {
        //     if ( in_array( $current_class, $classes ) ) 
        //     {
        //         $classes[] = "active";
        //         break;
        //     }
        // }


        $class_names = join( \' \', apply_filters( \'nav_menu_css_class\', array_filter( $classes ), $item, $args ) );

        $class_names = $class_names ? \' class="\' . esc_attr( $class_names ) . \'"\' : \'\';


        $output .= \'<li\'. $class_names .\'>\';

        $attributes  = ! empty( $item->attr_title ) ? \' title="\'  . esc_attr( $item->title .\' \'. $item->attr_title ) .\'"\' : \'\';
        $attributes .= ! empty( $item->target )     ? \' target="\' . esc_attr( $item->target     ) .\'"\' : \'\';
        $attributes .= ! empty( $item->xfn )        ? \' rel="\'    . esc_attr( $item->xfn        ) .\'"\' : \'\';
        $attributes .= ! empty( $item->url )        ? \' href="\'   . esc_attr( $item->url        ) .\'"\' : \'\';


        $attribute  = ! empty( $item->attr_title ) ? \'<span>\' . esc_attr( $item->attr_title ) . \'</span>\' : \'\';

        $item_output = \'<a\'. $attributes .\'>\';
            $item_output .= $args->link_before . apply_filters( \'the_title\', $item->title, $item->ID );
            $item_output .= $attribute . $args->link_after;
        $item_output .= \'</a>\';

        $output .= apply_filters( \'walker_nav_menu_start_el\', $item_output, $item, $depth, $args );
    }
}

我还需要属性字段位于范围内，以便进行一些样式设置。所以问题是我需要将“current\\u祖先”更改为类sel.

类sel正在“单页”上工作，所以唯一的问题是当im更深一层时。

我已经搜索了WPSE，但运气不好。谢谢

function my_navigation_class($classes, $item){
    foreach ($classes as $idx => $class) {
        if ($class == \'current_ancestor\') {
            $classes[$idx] = \'sel\';
        }
    }
    return $classes;
}
add_filter(\'nav_menu_css_class\' , \'my_navigation_class\' , 10 , 2);

// based on http://snipplr.com/view/58549/
class Clnr_Walker_Nav_Menu extends Walker_Nav_Menu {
    function start_el(&$output, $item, $depth, $args) {
        //~ pre($item);
        global $wp_query;
        $indent = ($depth) ? str_repeat(\'\\t\',$depth) : \'\';
        $class_names = \'\';
        $classes = empty($item->classes) ? array() : (array) $item->classes;
        $current_indicators = array(
            \'current-menu-item\',
            \'current-menu-parent\',
            \'current-menu-ancestor\',
            \'current_page_item\',
            \'current_page_parent\',
            \'current-page-ancestor\' // see Feb 20 update below
        );
        $newClasses = array();
        foreach($classes as $el) {
            if( in_array($el, $current_indicators) ) {
                array_push($newClasses, $el);
            }
        }
        $class_names = join( \' \', apply_filters(\'nav_menu_css_class\', array_filter($newClasses), $item) );

        $output .= $indent . \'<li class="\' . $class_names . \'">\';

        $attributes  = !empty($item->attr_title) ? \' title="\' . esc_attr($item->attr_title) . \'"\' : \'\';
        $attributes .= !empty($item->target) ? \' target="\' . esc_attr($item->target) . \'"\' : \'\';
        $attributes .= !empty($item->xfn) ? \' rel="\' . esc_attr($item->xfn) . \'"\' : \'\';
        $attributes .= !empty($item->url) ? \' href="\' . esc_attr($item->url) . \'"\' : \'\';

        if($depth != 0) {
            //children stuff, maybe you\'d like to store the submenu\'s somewhere?
        }

        $item_output = $args->before;
        $item_output .= \'<a\' . $attributes . \'>\';
        $item_output .= $args->link_before . apply_filters(\'the_title\', $item->title, $item->ID);
        $item_output .= \'</a>\';
        $item_output .= $args->after;

        $output .= apply_filters(\'walker_nav_menu_start_el\', $item_output, $item, $depth, $args);
    }
}