Add a link to top category menu

Hello.
I would like to add a link that opens in a new window to our shop blog. But I'm having troubles adding the link in the category menu on top.

I've included a screenshot of the location. Any tips would be greatly appreciated.

Thank you.

Try in \catalog\view\theme\xxxx\template\common\header.tpl

test by inserting a google link

look for
<div id="menu">
<ul>
<?php foreach ($categories as $category) { ?>
<li> ...
...
...
</li>

after </li> append google link below.. you'd have a link on top menu linking to external website.

<li><a href="http://www.google.com/" target="_blank">Google<a/></li>