[hider=1]stuff
[hider2=2]stuff
[hider3=2a]stuff[/hider3]
[/hider2]
[hider2=3]stuff
[hider3=3a]stuff[/hider3]
[/hider2]
[hider2=4]stuff
[hider3=4a]stuff[/hider3]
[/hider2]
[/hider]