/**
  * delete question from an id
  */
 function deleteQuestion()
 {
     //"get segment 1 , question segment 2 , (:any) segment 3
     $question_id = $this->uri->segment(3);
     $this->load->model('QuestionModel');
     $question = new QuestionModel();
     $delete_question_status = $question->deleteQuestion($question_id);
     echo json_encode(array("delete_question_status" => $delete_question_status));
 }