Thank you for help me Rikard.

I think i explain something wrong.

5th Main menu which has 8 sub menu. That part have 2nd line. (6 sub menu upwards, 2 sub menu downwards) .
I think i have too much submenu. but I’d like to make it in all the sub menu in one line.
please see screen shot ( http://onnurips.org/wp/wp-content/uploads/2015/04/onnurips_org.jpg)

Please help me ^^

Thank you for your reply. I added code that you give me.

But it’s not working. can you figure out other way ? Please~