Code Igniter: Highlight current page in menu

<ul>
	<li class="<?=($this->uri->segment(1)==='alfa')?'active':''?>"><a href="alfa/index" title="Alfa">Alfa</a></li>
	<li class="<?=($this->uri->segment(1)==='beta')?'active':''?>"><a href="beta/index" title="Beta">Beta</a></li>
</ul>