How to show list of categories on hover in Wordpress?

Question

CMS

There is such a problem: You need to implement a function in Wordpress for categories. You need to do this: The entry has several categories, but you need to show only one next to it (for example, alphabetically), and when you hover over this category, all the others will appear!
Already broke my head how to do it ... Who knows the solution?
For example, I can give a link - on a life hacker , such a solution is used there.

Answer 1

and what's the problem? prompt a function that receives categories in worpdress? suggest the implementation of such a dropdown menu? What problem do you want to solve?

Answer 2

I understand that no one knows how to do this?