Outline menu item if is current (not in wp_nav_menu)

Hi guys! ??
Twenty Eleven child theme. I have a custom header menu (unfortunately I can’t use wp_nav_menu ’cause I have a rather complex menu with images, not text. Then submenus with text..).

Anyway, it’s something like this:

<div id="blahblah" style="blahblah">
<a href="blahblah"><img style="blahblah" src="blahblahblahblah"></a>
<a href="blahblah"><img style="blahblah" src="blahblahblahblah"></a>
<a href="blahblah"><img style="blahblah" src="blahblahblahblah"></a>
<a href="blahblah"><img style="blahblah" src="blahblahblahblah"></a>
</div>

I added a img:hover tag and added an outline so that if you hover a menu item you see borders.

But I’d like to have the borders automatically on the current page too..

Is there a way (conditional tag?) to have this without having to create a custom template for each page of the menu?

Thanks in advance! ??