Putting "categories" and "published by" in the same line

[Lynne]

You need to set .cms_article_username to only 50% (and you only need one width in there) and also float it right and make the display type inline-block. The other one, you need to float left and also make the display type inline-block. Also, since the username needs to be floated right, you actually need to have the div for that before the div for the categories.