$output .='
                    <div>
                      <ul class="detail-attachments clearfix">
                        <?php
                          foreach ($list_file as $file) { ?>
                            <li id="datas">
                              <?php
                                if ($file["tipe"]=="image/jpeg" or $file["tipe"]=="image/bmp" or $file["tipe"]=="image/png") { ?>
                                  <span class="detail-attachment-icon has-img">
                                    <a href="'.base_url().'assets/files/file_materi/'.$data["file_name"].'" target="_blank">
                                      <img src="'.base_url().'assets/files/file_materi/'.$data["file_name"].'">
                                    </a>
                                  </span>
                                <?php }
                                else { ?>
                                  <span class="detail-attachment-icon"><i class="fa fa-file-o"></i></span>
                                  <div id="nama_filenya">

                                    <?php
                                      echo $data["file_name"];
                                      ?>
                                  </div>
                                <?php }
                              ?>
                              <div class="detail-attachment-info">
                                <button type="button" class="btn btn-danger btn-block btn-sm" data-toggle="modal" data-target="#konfirmasi_hapus<?php echo $data["id_file_materi"]; ?>">Hapus</button>
                                </a>
                              </div>
                            </li>

                          <?php }
                        ?>
                      </ul>
                    </div>
                ';

<div>
                    <ul class="detail-attachments clearfix">
                      <!--?php
                        foreach ($list_file as $file) { ?-->
                          <li id="datas">
                            <!--?php
                              if ($file["tipe"]=="image/jpeg" or $file["tipe"]=="image/bmp" or $file["tipe"]=="image/png") { ?-->
                                <span class="detail-attachment-icon has-img">
                                  <a href="http://localhost/ci_sc/assets/files/file_materi/camila-cabello-wonderland7.jpg" target="_blank">
                                    <img src="http://localhost/ci_sc/assets/files/file_materi/camila-cabello-wonderland7.jpg">
                                  </a>
                                </span>
                              <!--?php }
                              else { ?-->
                                <span class="detail-attachment-icon"><i class="fa fa-file-o"></i></span>
                                <div id="nama_filenya">
                                  <!--?php
                                    echo $data["file_name"];
                                    ?-->
                                </div>
                              <!--?php }
                            ?-->
                            <div class="detail-attachment-info">
                              <button type="button" class="btn btn-danger btn-block btn-sm" data-toggle="modal" data-target="#konfirmasi_hapus<?php echo $data[" id_file_materi"];="" ?="">">Hapus</button>

                            </div>
                          </li>

                        <!--?php }
                      ?-->
                      <!-- <li id="upload_files"></li> -->
                    </ul>
                  </div>