I have a wordpress theme which uses three columns. The center column is used for new posts. Posts are placed in different categories, which, on my site, stand for different writers. I would like for the right sidebar to display a short biography and picture of the category (writer) when people clicked on a post, but this short bio should not show on the homepage of the site. I think that for this to happen there should be a piece of dynamic code in the sidebar that links the category people are reading in to the right bio. Does anybody know how to do that? Thanks in advance.