gistfile1.js

var customResultRenderFunction = function(ctx, results) {
  var $list = ctx.list,
    config = ctx.config;

  $.each(results, function(document_type, items) {
    $.each(items, function(idx, item) {
      var $node = $('<li>' + item['title'] + '</li>');
      $node.data('document_type', document_type); // saves document_type for later access
      $node.appendTo($list);
      ctx.registerResult($node, item);
    });
  });
};