如果菜单是通过生成的wp_nav_menu, 您可以使用自定义Walker向特定项目添加动态子菜单。

首先是课堂，这将成为你的主题functions.php 文件或您自己的自定义插件：

class Walker_Author_Categories extends Walker_Nav_Menu {
    // we only need to override the function that closes each menu item,
    // this is where we can insert a submenu
    function end_el( &$output, $item, $depth=0, $args=array() ) {
        // if the current menu item being output is authors
        if( \'authors\' == $item->title ){
            // get all of the author categories
            $author_cats = get_terms( array(
                \'taxonomy\' => \'author_categories\',
                \'hide_empty\' => false,
            ) );
            if ( ! empty( $author_cats ) && ! is_wp_error( $author_cats ) ) {
                // url of the authors page
                // to be used to append #anchor links
                $parent_url = get_permalink( $item->object_id );
                // start a new list
                $output .= \'<ul>\';
                // iterate over each category
                // and add an li
                foreach( $author_cats as $author_cat ){
                    $slug = $author_cat->slug;
                    $name = $author_cat->name;
                    $format = \'<li><a href="%s#%s">%s</a></li>\';
                    $output .= sprintf( $format, $parent_url, $slug, $name );
                }
                // close the list
                $output .= \'</ul>\';
            }
        }
        // close the parent li
        $output .= "</li>\\n";  
    }
}

wp_nav_menu( array(
    \'theme_location\' => \'primary\',
    \'walker\' => new Walker_Author_Categories
) );