您可以通过custom walker function, 在您的菜单上。一个非常简单的例子：

class Walker_WPA82563_Submenu extends Walker_Nav_Menu {
    function end_el(&$output, $item, $depth=0, $args=array()) {
        if( \'Boats\' == $item->title ){
            $output .= \'<ul><li>Dynamic Subnav</li></ul>\';
        }
        $output .= "</li>\\n";  
    }
}

wp_nav_menu(
    array(
        \'theme_location\' => \'primary\',
        \'walker\' => new Walker_WPA82563_Submenu
    )
);

我相信有一个更好的解决方案，适用于菜单真正动态的情况（例如，它们应该根据用户角色而改变，或者如果菜单项的组合太多，需要在运行时确定）。

Wordpress\'wp_nav_menu_objects 挂钩最方便：

add_filter(\'wp_nav_menu_objects\', \'addMenuItems\', null, 2);
function addMenuItems($sortedItems, $args)
{
    $toAdd = [
        (object) [
            \'ID\'        => 1,               // make sure this doesn\'t conflict with existing items
            \'db_id\'     => 1,               // same here
            \'title\'     => \'To Google!\',
            \'url\'       => \'https://www.google.com\',
        ],
    ];

    return array_merge($sortedItems, $toAdd);
}