Add Submenu to WordPress Admin Bar

add to functions.php 

function create_Stephen_menu() {
	global $wp_admin_bar;

	$menu_id = 'Stephen';
	$wp_admin_bar->add_menu(array('id' => $menu_id, 'title' => __('Stephen'), 'href' => '/'));
	$wp_admin_bar->add_menu(array('parent' => $menu_id, 'title' => __('Homepage'), 'id' => 'Stephen-home', 'href' => '/', 'meta' => array('target' => '_blank')));
	$wp_admin_bar->add_menu(array('parent' => $menu_id, 'title' => __('Drafts'), 'id' => 'Stephen-drafts', 'href' => 'edit.php?post_status=draft&post_type=post'));
	$wp_admin_bar->add_menu(array('parent' => $menu_id, 'title' => __('Pending Comments'), 'id' => 'Stephen-pending', 'href' => 'edit-comments.php?comment_status=moderated'));
}
add_action('admin_bar_menu', 'create_Stephen_menu', 2000);

Setting an id on parent menu item allows parent key for submenu items

https://davidwalsh.name/add-submenu-wordpress-admin-bar By David Walsh on January 6, 2015

Tagged: