Go to the Settings -> Permalinks and add custom:
/%category%/%postname%/
Go to the Settings -> Permalinks and add custom:
/%category%/%postname%/
If your url looks like this:
http://www.yourblog.com/category/some-name-of-a-category
You could make it look like this:
http://www.yourblog.com/some-name-of-a-category
Just go to the Settings -> Permalinks and change Category base to (dot)
.