Replace the default gallery with a simple thickbox

gistfile1.php

add_action('init', 'load_classes');

/**
  *  Function Name: load_classes
	*  Description: Load the classes we need
	*  Date Added: Thu, Jan 24, 2013
*/

function load_classes(){
	global $GalleryHelper;
	$GalleryHelper = new GalleryHelper();
}


class GalleryHelper{
  
	function __construct(){
		// Remove the default wordpress shortcode
		remove_shortcode('gallery', 'gallery_shortcode');
		// Add our new gallery
		add_shortcode('gallery', array($this, 'gallery'));
	}
	/**
		*  Function Name: gallery
		*  Description: Replace the default wordpress gallery with our own
		*  Date Added: Mon, Jan 28, 2013
	*/
	public function gallery($attr){
		$gallery_id = time(); 
		$ids = explode(',',$attr['ids']);
		foreach($ids as $id){
			echo '<a rel="gallery-'.$gallery_id.'" href="'. array_shift(wp_get_attachment_image_src($id, 'large')).'" class="thickbox">'.wp_get_attachment_image($id, 'accommodation').'</a>';
		}
	}
}