function plt_hide_ultimate_lightbox_menus() {
//Hide the "Lightbox" menu.
remove_menu_page('ulb-settings');
//Hide the "Lightbox → Lightbox" menu.
remove_submenu_page('ulb-settings', 'ulb-settings');
//Hide the "Lightbox → About Us" menu.
remove_submenu_page('ulb-settings', 'ewd-ulb-about-us');
}
add_action('admin_menu', 'plt_hide_ultimate_lightbox_menus', 12);