Prosites different level showing different content

Who can help me please !

I just want to achieve this:

I have 2 level which is Silver and Gold in Prosites. I want Silver level just showing the content 1,3,5 and Gold level will showing content 2,4,6 . Im using WHMCS to handle registration and Payments.

Somebody can help me or give me an instructions .I have read this post it is talking about the custom coding ,How to modify for my needs? But I hope somebody could give me a further explain instructions and help with the code would be greatly appreciated?

Thanks