Phoenix Column shortcode

the individual columns

// Add Shortcode
function column_shortcode( $atts , $content = null ) {

	// Attributes
	extract( shortcode_atts(
		array(
			'size' => 'twelve',
		), $atts )
	);

	// Code
if ($a['size']) {$size = $a['size'];}

$output = '';
$output .= '<div class="column' . $centered . '">';
$output .= do_shortcode($content);
$output .= '</div>';

return $output;
}
add_shortcode( 'column', 'column_shortcode' );