onahapa

foreach ($query_country as $country) {
            $query_mark = self::findAll([$country->id]);
                $mass[] = [
                    'label' => $country->country_name,
                    foreach ($query_mark as $mark) {
                        'items' => [
                            [
                                'label' => $mark->mark,
                                'url' => ['#']
                            ],
                        ]
                    }
                ];
        }