function plt_hide_easy_fancybox_menus() {
//Hide the "Lightbox" menu.
remove_menu_page('firelight-settings');
//Hide the "Lightbox → Settings" menu.
remove_submenu_page('firelight-settings', 'firelight-settings');
//Hide the "Lightbox → Go Pro" menu.
remove_submenu_page('firelight-settings', 'firelight-pro');
}
add_action('admin_menu', 'plt_hide_easy_fancybox_menus', 11);