knr grid_3 box

// Add Shortcode
function grid_3_shortcode( $atts , $content = null ) {

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

	// Code
$r= '<div class="grid_3 '.$class.'"';
if($float != 'left') $r .= ' style="float: '.$float.'"';
$r .= '>'.$content.'</div>';
return $r;
}
add_shortcode( 'grid_3', 'grid_3_shortcode' );