Tag Filtering

Hello, i need to "divide" my site into 3 categories, i currently have 3 sitewide categories but i would like as an option in the header 4 clickable boxes that users can click upon login to select what category of information they want to see. For example if the 3 filters are square, triangle, circle i would like 4 boxes/images/llink/text  labelled Square, Triangle, Circle, All. So if the logged in user only wants to look at content tagged Circle that person could click the Circle image/text/whatever and the site only shows blogs, bookmarks, pictures etc tagged "circle"

I hope i have described this well as this would be a huge step for my website and needs to be done, i would really like someones help with this please.

Thank You

Feedback and Planning

Feedback and Planning

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