functions.php

<?php

/**
 * Column Classes
 *
 * @param int $columns, how many columns content should be broken into
 * @param int $count, the current post in the loop (starts at 0)
 * @param int $extra_classes, any additional classes to add on all posts
 * @return string $classes
 * 
 * @author Bill Erickson
 * @link http://www.billerickson.net/code/get-column-classes/
 */
function be_column_classes( $columns = 2, $count = 0, $extra_classes = '' ) {
	$column_classes = array( '', '', 'one-half', 'one-third', 'one-fourth', 'one-fifth', 'one-sixth' );
	$output = $column_classes[$columns];
	if( 0 == $count || 0 == $count % $columns )
		$output .= ' first';
	if( $extra_classes )
		$output .= ' ' . $extra_classes;
		
	return $output;
}