I have installed K2 plugin and all urls ok
The problem is in meta tag. The meta tag generated have code html. How can i have meta tag without html code?
Thanks

Hi,
The HTML tags should be removed from meta tags generated by JoomSEF. Could you please post an example of such meta tags? Thank you.

<meta name="og:description" content="text correct and l&amp;amp;#039;esperienza. L&amp;amp;#039;esperienza che c..." />
<meta name="description" content="text correct and l&amp;#039;esperienza. L&amp;#039;esperienza che c..." />

This is an example

The og:description is handled entirely by K2, JoomSEF doesn't generate it.
And check what meta description is stored for the SEF URL in JoomSEF. From what I've tested it seems that you use the &#039; html entity in your K2 item. JoomSEF stores it like that, but Joomla incorrectly adds the &amp;.

I have installed plugin for virtuemart and i have the problem...

I think that the same answer is also valid for VirtueMart. Or do you have some more information about the problem with VirtueMart?