Child forum list under parent forum description

[AsukaValentine]

Hello
I'm not sure if this is an option of vbulletin or if it's a modification. I'm searching it at admin cp and can't found it... and I'm searching in this forum for a hack and I don't know what I should put in the search.

I need this for my forum:



Because we have some child forums and user need to enter parent forum and see the list, it will be better if them can access this forums from index page.

Thank you very much for your help!