perbaikan 2

                <?php
                          //koneksi ke database
                          include "../koneksi.php";
                          //query
                          $sql = "SELECT * FROM m_soal order by tgl_input desc";
                          //execute query
                          $no=0;
                          $rest = mysql_query ($sql);
                          //isi baris ke array
                          while($data= mysql_fetch_array($rest))
                          {
                      $no++;
                ?>
                <div class="panel panel-default">
            <div class="panel-heading" role="tab" id="headingOne_<?=$no;?>">
<!-- alamat ID diganti -->
              <a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapse_<?=$no;?>" aria-expanded="false" aria-controls="collapseOne" class="collapsed">
                #<?php echo $no ?> : <?php echo $data['soal']?></a>

              <div class="btn-group tombol-kanan">
                <a class="btn btn-default btn-xs">Pembuat: Dr. Susilo Bambang Yudhoyono</a>
                <a class="btn btn-info btn-xs" onclick="return m_soal_e('1');"><i class="glyphicon glyphicon-pencil" style="margin-left: 0px; color: #fff"></i> &nbsp;&nbsp;Edit</a>
                <a class="btn btn-warning btn-xs" onclick="return m_soal_h('1');"><i class="glyphicon glyphicon-remove" style="margin-left: 0px; color: #fff"></i> &nbsp;&nbsp;Hapus</a>
              </div>
            </div>
<!-- alamat ID diganti -->
            <div id="collapse_<?=$no;?>" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne" aria-expanded="false" style="height: 0px;">
              <div class="panel-body">

                        <table class="table table-bordered"><tbody>
              <tr style="background: #dff0d8"><td width="2%">a</td><td width="98%"><?php echo $data['opsi_a']?></td></tr>
              <tr><td width="2%">b</td><td width="98%"><?php echo $data['opsi_b']?></td></tr>
              <tr><td width="2%">c</td><td width="98%"><?php echo $data['opsi_c']?></td></tr>
              <tr><td width="2%">d</td><td width="98%"><?php echo $data['opsi_d']?></td></tr>
              </tbody>
            </table>
                          </div>
            </div>
          </div>
          <?php
          }
          //ini tutup while ?>