[Plugin: List category posts] Categorie ID or Slug for each Post

Hi,
how can i show the categorie for each post?
I tried editing the template, but couldn’t get a conclusion….

Actually i want to call the id für each post, cause i have different categorie ids and depending on the categorie id i want to show a different icon…

Thanks for help!

http://wordpress.org/extend/plugins/list-category-posts/