function plt_hide_trucker_to_trucker_listings_menus() {
//Hide the "Settings → TruckerToTrucker Listings" menu.
remove_submenu_page('options-general.php', 'TruckerToTrucker_Listings');
}
add_action('admin_menu', 'plt_hide_trucker_to_trucker_listings_menus', 11);