Adds the ability to render html in the list.

data-html-chosen.jquery.js

  $ = jQuery;

  $.fn.extend({

    chosenDataHtml: function(options) {
      return this.each(function(input_field) {
        var $this = $(this),

            formatSelection = options['formatSelection'] || function(e, data) {
              var chosen     = data.chosen,
                  selected   = chosen.form_field_jq.find("option:enabled[value!='']:selected:first"),
                  html       = selected.data('html');

              if ( html ) {
                chosen.container.find('.chosen-single').find('> span:first').html(html);
                if ( selected.length )
                  chosen.container.find('.chosen-single').removeClass('chosen-default')
              }
            },

            formatList = options['formatList'] || function(e, data) {
              var chosen        = data.chosen,
                  options       = chosen.form_field.options,
                  isFirstEmpty  = options[0].value === '' ? 1
                                                          : 0 ;

              return $(chosen.container).find('.chosen-drop ul .group-option').each(function(index){
                $(this).html($(options[index + isFirstEmpty]).data('html') || $(this).html())
              });
            };

        if ( options !== "destroy") {
          $this
            .on("chosen:ready",             formatSelection)
            .on("chosen:hiding_dropdown",   formatSelection)
            .on("chosen:showing_dropdown",  formatList);
        }

        return $this.chosen(options);
      });
    }

  });