?Itemid=0 in Virtuemart category url. How to remove it?!

[lextor]

My site : http://autogadget.eu/
Joomla Version : 2.5.6
Virtuemart Version : 2.0.26d

Hello everyone! How I can remove  ?Itemid=0 from category link, as you see in attach? I have seo enabled in virtuemart, friendly urls and rewrite in joomla. Also I use sh404SEF . For Multi-level category I use an extension called Nextend Accordion Menu V9