Recently I was searching for a new style and as I remember none was looking like this. Still believe that the user has choosen a white style, modified the header and then used a plugin which exist here to set icons per category.
The screenshot shows only a part of the page so it's difficult to understand it. It's better to share the link.
--------------- Added [DATE]1420659810[/DATE] at [TIME]1420659810[/TIME] ---------------
For my site finally I modified the default style. Look it:
Homepage (custom content):
http://www.lagadas.com/
Forumhome:
https://www.lagadas.com/forum.php