$command = Yii::app()->db->createCommand()
->select("{{questions}}.qid,{{groups}}.group_order, {{questions}}.question_order")
->from($questionTable)
->where("({{questions}}.sid = :sid AND {{questions}}.parent_qid = 0)")
->join('{{groups}}', "{{groups}}.gid = {{questions}}.gid")
->order("{{groups}}.group_order asc, {{questions}}.question_order asc")
->bindParam(":sid", $iSurvey, PDO::PARAM_INT);
$allQuestions = $command->query()->readAll();

            $api = new LimesurveyApi();
            $lang = $api->getCurrentUser()['lang'];
            $questions = $api->getQuestions($surveyId, $lang, ['gid' => $groupId]);
 
            $questionIds = [];
            foreach ($questions as $question) {
                $questionIds[] = $question['qid'];
            }