How to make from other folder go away completely when navigating to other folders

Is there a way to make keywords from one folder completely go away when navigating to a new parent folder. For example, I have a folder of animal entourage and one of the keyword groups is type, with words like dog, cat, domestic, etc. In a different folder, I have landscape elements, also with a 'type' keyword group, with words like fence, fire, rocks, etc. When I navigate away from the animal folder and into the landscape elements folder, the dog and cat keywords come with me and appear in the sidebar. I want to be able to click on a folder and only those keywords associated with it appear, then click out of it, and those keywords go away. Does anyone have a solution to this?

Thanks