A Wordpress Question
 

How may i change Categories and tags extensions to .html?

Yet i did it for posts, but anybody knows that how it's possible to do that for Categories and Tags?

bump bump

I know you can add html extensions to pages and posts with permalinks but not with categories or tags. I don't think it's possible.

try super cache plugin or something like that, i think it could be possible, in any case u can write custom script for it....

If your doing this for seo purposes that's not gonna help anyways. You should probably use nofollow tags and robots for your categories and tags so you dont have duplicate content issues.

Yep, or something like "all in one seo" that automatically adds the noindex tags on archives and tags. If you really want .html ending, simply edit your .htaccess to do the job.