<div id="navcontainer">
 <ul id="navlist">
   <li><a href="#" id="current">Item one</a></li>
   <li><a href="#">Item two</a></li>
   <li><a href="#">Item three</a></li>
   <li><a href="#">Item four</a></li>
   <li><a href="#">Item five</a></li>
 </ul>
</div>

This is my code for menus. How to hide "Item two, three, four, five", If "Item one" is clicked (using jquery)?

Haven't tested it, but it should work.

$('#navlist li').click(function(){
    $('#navlist li').hide();

    $(this).show();
});