Go to the “Knowledge Bases” menu, hover on the relevant knowledge base instance and access the frontend view by clicking on “View”:

Each category in a knowledge base can be accessed indirectly by opening the knowledge base main view and drilling down to the the required category.

If you would like to directly access a category link, go to the list of categories and copy the link from the “View” option:

You can access a specific tag frontend view by opening the list of tags and copy the link in “View: