function plt_hide_trekking_sudtirol_integration_wanderkarten_menus() {
//Hide the "Settings → Trekking Sdtirol" menu.
remove_submenu_page('options-general.php', 'trekk.php');
}
add_action('admin_menu', 'plt_hide_trekking_sudtirol_integration_wanderkarten_menus', 11);