".jhtm" (which is the href document type) is Java HTML. Dynamo Server pages.
We can't tell much without code. But I can tell you to look in the document that has this erroneous link, look for the <a href="category.jhtm?cid=15"></a> that is surrounding the incorrect image, and change it to the correct cid value.
If anyone knows of a website that can offer ColdFusion help that isn't controlled by neurotic, pedantic jerks* (stackoverflow.com), please PM me with a link.
* The neurotic, pedantic jerks are not the owners; just the people who are in control of the "popularity contest".