BI.createWidget({
  type: "bi.text_value_down_list_combo",
  element: "#wrapper",
  text: "text",
  items: [
    [{
      el: {
        text: "1",
        value: 1
      },
      children: [{
        text: "11",
        value: 11
      }]
    }],
    [{
      text: "2",
      value: 2
    }, {
      text: "3",
      value: 3
    }]
  ]
});