Need spacing code help

[gjh42]

"row of category links"? Do you mean the "Kits Quick Pages Layout Templates Commercial Use"?
For those, find this in your stylesheet

#navMain ul li a, #navSupp ul li a, #navCatTabs ul li a {
	text-decoration: none;
	padding: 0em 0.5em;
	margin: 0;
	color: #000000;
	}

and add below it

#navCatTabs ul li a {font-size: 1.3em;}

If you mean something else, you'll have to explain in more detail.