$k.typeahead({
    items: MallConf.suggest.suggest_count,
    source: suggestSource, //假设这个地方返回的值结构是这样的 [{"keyword":"iphone", "category_id": 1,"category_name":"cell phone"},...]
    updater: suggestSelect,
    matcher: function (item) { //须重写
      return true;
    },
    sorter: function (items) { //重写
      var beginswith = [];
      var caseSensitive = [];
      var caseInsensitive = [];
      var item;

      while (item = items.shift()) {
        if (!item.keyword.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item);
        else if (~item.keyword.indexOf(this.query)) caseSensitive.push(item);
        else caseInsensitive.push(item);
      }

      return beginswith.concat(caseSensitive, caseInsensitive)
    },
    highlighter: function (item) { //重写
      var keyword = item.keyword;
      var query = this.query.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&')
      var first_part = keyword.replace(new RegExp('(' + query + ')', 'ig'), function (match) {
        return '<strong>' + match + '</strong>'
      });
      return first_part + '<span id="' + item.genre_id + '">' + item.genre_name + '</span>'
    }
  });