jquery.plugin.wrapInGroups.js

/**
 * Takes a jQuery collection and wraps each 'groupSize' items with 'wrapHtml'
 * Example: $('#Example span').wrapInGroups('<div/>', 4);
 * Will wrap every 4 span's inside #Example with a div
 * See for yourself: http://jsfiddle.net/M9ZFh/
 * Author: iMoses (imoses.g@gmail.com)
 */
(function($) {
	$.fn.wrapInGroups = function(wrapHtml, groupSize) {
		var selector	= this.selector;
		groupSize	= groupSize || 1;
		this.filter(':nth-child(' + groupSize + 'n+1)').each(function() {
			$(this).nextAll(selector + ':lt(' + (groupSize - 1) + ')').andSelf().wrapAll(wrapHtml);
		});
	};
})(jQuery);