I already have a sidebar on the article page that shows only categories. As you can see:
But I need to toggle categories, sections and articles. As in this example:
https://lotus-one-theme.zendesk.com/hc/en-us/articles/360014146220-What-is-Lotus-Themes-
I've been trying for a long time and the tutorials I've seen so far aren't working. Does anybody know how to solve this?

Hey Isabel,
Are you using a Lotus theme currently in your Help Center? If so, you may want to reach out to their support team so they can help point you in the right direction.
Let me know!Hey Customer Care Team,