Sub-Menu Items List to Long

Hi weblizar

I have another problem with the menu, im sorry for do not be able to solve them from my self, but if possible need your help.

I have a big sub-menu items, and this do not show me all the sub-menu items, even if i scroll down, of course that will affect on most “laptops” desktops have taller screens but the best way should be

item1 item5 item9
item2 item6 item10
item3 item 7 item11
item4 item 8 item12

is there a way to do that?

would be awesome
Best Regards