Hide something from guests?

[fanSte-]

Hello how to hide some custom thing from guest

Code: [Select]

<div id="nav">
',template_menu(),'
</div>
<a class="ucp" href="http://summer-life.info/ucp/"></a>
</div>
<div id="userinfo">';

<a class="ucp" href="http://summer-life.info/ucp/"></a>

This is my code, how to hide it from guests?