Megamenu style and numerb of column

Hello,
I have a submenu (PORTFOLIO) with 8 voices, I’d like to show this 8 voices in only a row of megamenu, but the 7th link goes to a new row.
How can I show the voice in 8 columns?

I also like to show the title like a voice of main menù, in the same style.

With this code, the font is the same, but the size not.

.mega_menu_title{
	font-family:'Lato', Arial, Helvetica, sans-serif !important;
	font-size:13px !important;
}

Thank you very much for your help!