Add the below code into your links.phtml file from the following path.
app\design\frontend\mypackage\mytheme\template\page\template\links.phtml
<script type="text/javascript">
jQuery(function(){
var url = window.location.pathname,
urlRegExp = new RegExp(url.replace(/\/$/,'') + "$");
// create regexp to match current url pathname and remove trailing slash if present as it could
// collide with the link in navigation in case trailing slash wasn't present there
// now grab every link from the navigation
jQuery('.links a').each(function(){
// and test its normalized href against the url pathname regexp
if(urlRegExp.test(this.href.replace(/\/$/,''))){
jQuery(this).addClass('active');
}
});
});
</script>
NOTE: Please change your class name if its different in your code.
Hope this helps you.
Query solved? Accept as Solution.Thanks
Eric Baily