Box Shortcode

Replaces [grid] with [box]

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

	// Attributes
	extract( shortcode_atts(
		array(
			'class' => 'box-left',
		), $atts )
	);

	// Code
// Allow nested shortcode
return '<div class="' . $class . '">' . 
	do_shortcode($content) . '</div>';
}
add_shortcode( 'box', 'box_func' );