Icon for sub categories stange in Menu layout

[jorgen.i]

Hi,

I know this is easy for someone that handles Firefox bug tracker. I got after a small change in the layout (showing child categories automatically) some "half arrow icons" inside the text where the sub category is.
I suppose the file to edit is the helper.php file in mod_rokvirtuemart_categories but I do not understand where to change.

Look at the "fly shit" that is over the menu text to the left.
http://www.prylfabriken.se/

Thanks!