สอบถามผู้รู้ ต้องการเก็บประวัติที่ถูกแก้ไขแล้วนำมาโชว์ ควรทำอย่างไร

 function edit_profile($user_id)
  {
    // if there is any post param
    $is_submit = $this->input->post('edit-profile-form');


    // validation part
    // The custom rules 'identity_available' and 'validate_password' can be found in '../libaries/MY_Form_validation.php'.
    $validation_rules = array(
      array('field' => 'firstname', 'label' => 'ชื่อจริง', 'rules' => 'required'),
      array('field' => 'lastname', 'label' => 'นามสกุล', 'rules' => 'required'),
      array('field' => 'nationality', 'label' => 'เชื้อชาติ', 'rules' => ''),
      array('field' => 'citizen_id', 'label' => 'เลขที่บัตรประชาชน', 'rules' => 'required'),
      array('field' => 'email', 'label' => 'email', 'rules' => 'required|valid_email|identity_available'),
      array('field' => 'primary_lang', 'label' => 'ภาษาหลักที่เข้าใจ', 'rules' => ''),
      array('field' => 'sex', 'label' => 'เพศ', 'rules' => ''),
      array('field' => 'phone', 'label' => 'เบอร์โทรศัพท์', 'rules' => ''),
      array('field' => 'mobile', 'label' => 'เบอร์โทรศัพท์มือถือ', 'rules' => ''),
      array('field' => 'address1', 'label' => 'ที่อยู่', 'rules' => ''),
      array('field' => 'address2', 'label' => 'ที่อยู่2', 'rules' => ''),
      array('field' => 'province', 'label' => 'จังหวัด', 'rules' => ''),
      array('field' => 'zipcode', 'label' => 'รหัสไปรษณีย์', 'rules' => ''),
    );

    $monk_validation_rule = array(
      array('field' => 'preceptor', 'label' => 'พระอุปัชฌาย์', 'rules' => ''),
      array('field' => 'priesthood_year', 'label' => 'ปีที่อุปสมบท', 'rules' => ''),
      array('field' => 'priest_of_rank', 'label' => 'สมนศักดิ์', 'rules' => ''),
      //array('field' => 'temple_id', 'label' => 'วัด', 'rules' => 'required'),
      array('field' => 'monk_name', 'label' => 'ชื่อฉายา', 'rules' => ''),
      array('field' => 'monk_id', 'label' => 'เลขที่ประจำตัวสงฆ์', 'rules' => ''),
    );
    $layman_validation_rule = array(
      array('field' => 'education', 'label' => 'ระดับการศึกษา', 'rules' => ''),
      array('field' => 'field_of_study', 'label' => 'สาขา', 'rules' => ''),
      array('field' => 'occupation', 'label' => 'อาชีพ', 'rules' => ''),
      array('field' => 'educational_institution', 'สถาบันการศึกษา' => 'อาชีพ', 'rules' => ''),
    );

    if (isset($is_submit))
    {
      // create user and profile
      $result = false;
      // set validation rule
      
      $profile_type = $this->input->post('profile_type');
      if ($profile_type == 1)
      {
        $this->form_validation->set_rules(array_merge($validation_rules, $layman_validation_rule));
      }
      else if ($profile_type == 2)
      {
        $this->form_validation->set_rules(array_merge($validation_rules, $monk_validation_rule));
      }
      
      // Run the validation.
      if ($this->form_validation->run())
      {
        $result = $this->_prepare_data_and_update($user_id);
      }
      else
      {
        $this->data['error'] = validation_errors();
      }
      
      // create a user
      if($result) 
      {
        $this->session->set_flashdata('message', 'ทำการเปลี่ยนข้อมูลเรียบร้อยแล้ว');

        //$this->send_change_password_confirmation();

        redirect("admin/users/edit_profile/".$user_id, 'refresh');
      }

    }

    $user = User::find($user_id);
    $this->data['user_id'] = $user_id;
    $this->data['staff'] = $user;
    $this->data['profile'] = $user->profile;
    $this->data['email'] = $user->uacc_email;
    $this->data['firstname'] = $user->profile->firstname;
    $this->data['lastname'] = $user->profile->lastname;
    $this->data['addresses'] = $user->profile->addresses;
    $this->data['secondary_langs'] = $user->profile->secondary_languages;

    $this->data['profilelogs'] = Profilelog::all();  //ส่วนนี้จะดึงเอาข้อมูลที่ถูกแก้ไขแล้ว ที่ถูกเก็บไว้ที่ DB->profile_logs ดึงมาโชว์ทั้งหมด

    // generate dropdown lists
    $this->data['profile_type_list'] = ProfileType::get_select_list();
    $this->data['sex_list'] = Sex::get_select_list();
    $this->data['nationality_list'] = Nationality::get_select_list();
    $this->data['primary_lang_list'] = Language::get_select_list();
    $this->data['occupation_list'] = Occupation::get_select_list();
    $this->data['secondary_lang_list'] = Language::get_select_list(); unset($this->data['secondary_lang_list'][""]);
    $this->data['province_list'] = Province::get_select_list();

    $this->data['priest_of_rank_list'] = PriestOfRank::get_select_list();
    $this->data['temple_list'] = Temple::get_select_list();

    $this->data['title'] = "แก้ไขประวัติของ".$user->profile->firstname.' '.$user->profile->lastname;
    // style for this page
    $this->data['page_styles'] = array("bootstrap-datetimepicker.min.css");
    // script for this page
    $this->data['page_scripts'] = array("moment.js", "bootstrap-datetimepicker.min.js", "admin.edit.user.profile.js");
    // $this->data['inpage_script'] = "bookings/_calendar_js";

    // specify view
    $this->data['view_name'] = "/admin/users/edit_profile";
    
    $this->load->view('layouts/main', $this->data);
  }

controllers
  private function _prepare_data_and_update($user_id)
  {
    $user = User::find($user_id);


    $log_attribute = new Profilelog();

    $log_attribute->profiles_id = $this->input->post('id');
    $log_attribute->citizen_id = $this->input->post('citizen_id');
    $log_attribute->firstname = $this->input->post('firstname');
    $log_attribute->lastname = $this->input->post('lastname');
    $log_attribute->save();      //ส่วนนี้เป็นข้อมูลที่จะจัดเก็บแล้วนำมาแสดง