[Steven Zahm]

@ Bene

re: It worked, but I think you mixed something up :-)

Yep, I did :/

the code is right, but change the meta_key the Category Slug. You can find these on the Categories admin page.

re: So I don’t need the assigned categories of an entry, but the current selected category from the shortcodes…

The shortcode options will be found in the $atts array. So the category shortcode option would be found like this:

$atts['category']

So using the shortcode from your original post, the value would be 4. Does that help you?