change a headline to a link

My website: http://www.prüfungsfragen.de
I use the demo-theme: Royal Pub

I would like to format the headlines on the homepage to links.

For instance:
If I click on the headline “Wine Country” in the demo-theme, I would like to navigate to a category website.

On my website I would like, that the user get forwarded to my category site „Prüfungstipps“, when he/she clicks on the headline “Prüfungstipps”

=> How can I implement this?

Thanks in advance.