How do I achieve this forum structure?

[dog8food]

http://ruralinfo.net/ruralmailtalk.html

I like the layout of this compared to this support forum.

I want to display all the forums with some topics underneath just like this but I can't figure out how to do so.

[jonaspm {Helper}]

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[dog8food]

well do you know how to do it?

[arrow]

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