Same code as above, just in the php container.
<div id="navcontainer">
<ul id="navlist">
<li><a href="index.php">Home</a></li>
<li><?php if(WA_Auth_RulePasses("Logged in to users")){ // Begin Show Region ?>
<a href="users_LogOut.php">Log Out</a>
<?php } // End Show Region ?>
<?php if(!WA_Auth_RulePasses("Logged in to users")){ // Begin Show Region ?>
<a href="users_LogIn.php">Log In</a>
<?php } // End Show Region ?></li>
</ul>
</div>