Master Page Menu items hide in Content Page.

Question

I have menu like below :

I want to hide some menu items in Child page when child page is Load. plz give me advice how can i do this.

<div>

    <ul id="navmenu">   

    <li class="style1"><a href="#"> Home </a></li>

    <li><a href="#" target="_self"> Edit</a>

    <ul class="sub1">

            <li><a  href="cust.aspx" target="_self"> Add Category </a></li>

            <li><a  href="search.aspx" target="_self"> Delete </a></li>

            <li><a  href="search.aspx" target="_self"> Update </a></li>

 

    </li>

    </ul>

    <li><a href="frmInputForm.aspx" target="_self" target="_self"> Add Consumer</a></li>

    <li><a herf="#"> SMS SEND</a>

            <ul class="sub1">

                <li><a href="MainPage.aspx" target="_self">Template SMS </a></li>

                <li><a href="custSMS.aspx" target="_self">Customize SMS</a></li>

                <li><a href="#" target="_self">Upload File</a>

                    <ul class="sub2">

                        <li><a href="uploadDetail.aspx"> Excel</a></li>

                        <li><a herf="#"> Word</a></li>

                        <li><a herf="#"> Other</a></li> 

                   </ul>

                </li>  

           </ul>

    </li>

    <li><a herf="#"> Report</a></li>

   

            <li><asp:LinkButton ID="LinkButton1" runat="server" Height="24px"

                    Width="105px" onclick="LinkButton1_Click">Logout</asp:LinkButton></li>

   

    </div>