Filter repeating group?

Hi people, my question is simple I have an blog page and every blogs contains category and I created option set for the category and I want to filter an repeating group from an other repeating group that consists category. I hope there must be a solution for it.



Maybe some of this videos can help:

I think this video is exactly what you want to do. It uses a multiselect dropdown instead of a repeating group to allow users to select a tag but the main idea is the same: