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How do I divide the page into two sections where the left is a menu and the right is a post

I’m trying to make a help centre like page, where the left division has drop downs with link blocks in it. Both the DropDown and the Links in it are controlled in CMS using a multi reference.

I want to be able to:

· Display a post in the right side of the page when the Link in the left is clicked and it should change when another link is being clicked on.

I have attached images resembling it, please help me out!

So if i click Designer Ultima, it has to show a specific post inside the right Div, and the same for the other Links.