#JQUERY #UTIL equalizeHeights

equalizeHeights.js

/**
 * Set the height from every jQuery element to the highest of the elements.
 * @returns {object} the jquery objects passed in with the new height.
 */
$.fn.equalizeHeights = function() {
	var maxHeight = 0,
		itemHeight = 0;

	this.each(function(index, element) {
		var $element = $(element);
		itemHeight = parseInt($element.outerHeight());
		maxHeight = itemHeight > maxHeight ? itemHeight : maxHeight;
	});

	return this.css({'height':maxHeight});
};

use_it_like.js

/**
 * Method that calculates max height and applies styles
 * @method
 * @private
 */
Plugin.prototype._setHeights = function() {
	this.$list = $('ul.cards');
	this.$items = this.$element.find('li');

	// OrT: IE9 floating point forces rounds down, so it makes to have 1 less element per column.
	var perRow = Math.round(this.$list.width() / this.$items.width());
	this.$items.css('height', 'auto');

	// exit there are no columns
	if (typeof perRow === 'number' && perRow && perRow > 1) {
		for(var i = 0, j = this.$items.length; i < j; i += perRow) {
			var $row = this.$items.slice(i, i + perRow);
			$row.equalizeHeights();
		}
	}
};

use_it_like_2.js

$('.my_list').hide().find('li').equalizeHeights().end().show();