$(document).ready(function() {  
	$('.col_1').each(function() {
		var widest = 0;
		$(this).find('a').each(function() {
			var thisWidth = $(this).width();
			widest = thisWidth > widest ? thisWidth : widest;
		});
		$(this).width(widest + 5);
	});
	$('.col_1 li:last-child').addClass('last');
});