Subforum url corrupted

[markoroots]

Hi guys,
please is there some one that can help me???

I have a forum www.sigarettaelettronicaforum.it

and there are 2 section that point to wrong urls
so that when you click it come back to the home page becouse i set it that when there is a page that isn't found it redirect you on the home page.

The 2 subforum that are not working are:

"Negozi fisici"

and also the section "Sondaggi"

if you see them have a wrong urls

How i can edit those urls with the right url??

Any help is really appreciated.