I have tried to insert the code into the category's description, but I only get the code, not the code's result! It seems that most plugins are only available in the content field. the following images will show you more details:

In the sections or categories' description field, the result is:

In the content field, the result is:

How to make the plugins be available in the description field? or can you please develop a plugin to enable thus function?
Thanks and regards
mingzhong