I've noticed from Webmaster Tools that there there is a good site that is somehow malforming our urls. From the particular site, they look like this:

Code:
www.domain.com/<b>this</b>_is_<b>the</b>_url/
I want to perform a 301 .htaccess rewrite that will strip all instances of <b> and </b> so that the above url would be:

Code:
www.domain.com/this_is_the_url/
Can someone tell me how to do that? I'm not getting anywhere.

Thanks.