Asp.Net menu access according to login permission

<div>
           <span class="preload1"></span><span class="preload2"></span>
           <ul id="nav2">
               <li class="top"><a href="Setup.aspx" class="top_link" title="Setup"><span class="down">
                   Setup</span></a>
                   <ul class="sub">
                       <li class="fly"><a href="#" class="fly">UserAuth<%--entication--%></a>
                           <ul>
                               <li><a href="UserAuthenticationAdd.aspx">Add</a></li>
                               <li><a href="#">Edit</a></li>
                               <li><a href="#">Delete</a></li>
                           </ul>
                       </li>
                   </ul>
               </li>
               <li class="top"><a href="#" id="products" class="top_link" title="Master"><span class="down">
                   Master</span></a>
                   <ul class="sub">
                       <li class="fly"><a href="#" class="fly" title="Class Master">Class</a>
                           <ul>
                               <li><a href="ClassAdd.aspx">Add</a></li>
                               <li><a href="ClassEdit.aspx">Edit</a></li>
                               <li><a href="ClassDelete.aspx">Delete</a></li>
                           </ul>
                       </li>
                       <li class="fly"><a href="#" class="fly" title="Subject Master">Subject</a>
                           <ul>
                               <li><a href="SubjectAdd.aspx">Add</a></li>
                               <li><a href="SubjectEdit.aspx">Edit</a></li>
                               <li><a href="SubjectDelete.aspx">Delete</a></li>
                           </ul>
                       </li>
                       <li class="fly"><a href="#" class="fly" title="Question Master">Question</a>
                           <ul>
                               <li><a href="QuestionAdd.aspx" title="Add">Add</a></li>
                               <li><a href="QuestionEdit.aspx">Edit</a></li>
                               <li><a href="QuestionDelete.aspx">Delete</a></li>
                           </ul>
                       </li>
                   </ul>
               </li>
              </ul>
        </div>