Hello Tuan,
first let me say, that I really like your component EDocman. Does just what I need it to do and such a nice code in the frontend.
I have just one simple question (I searched if the answer already existed, but didn't find anything):
If you are in a subcategory, do you have an option to show some link to go up to the parent category? I didn't find anything in the backend configuration. Also I couldn't find any such link in your demo pages. So I surmise you don't have it implemented.
So my - maybe not so simple - next question is: I want to integrate such a link in an override in "table.php". What would be the code for it? And I don't mean something like "history.go(-1)"