Menú en el backend

// Add Toolbar Menus
function mm_toolbar() {
	global $wp_admin_bar;

	$args = array(
		'id'     => 'Cursos',
		'title'  => __( 'Cursos', 'mm_toolbar' ),
	);
	$wp_admin_bar->add_menu( $args );

	$args = array(
		'id'     => 'curso-wordpress',
		'parent' => 'Cursos',
		'title'  => __( 'Curso Wordpress', 'mm_toolbar' ),
	);
	$wp_admin_bar->add_menu( $args );

	$args = array(
		'id'     => 'snippets',
		'parent' => 'Cursos',
		'title'  => __( 'Snippets', 'mm_toolbar' ),
		'href'   => 'http://localhost:8080/wordpress/wp-admin/admin.php?page=snippets',
	);
	$wp_admin_bar->add_menu( $args );

}
add_action( 'wp_before_admin_bar_render', 'mm_toolbar', 999 );