//wxml
<text wx:for="{{titles}}" wx:key="{{index}}" bindtap='changeClassify' data-id="{{index}}">{{item.name}}</text>

//js
function changeClassify(e) {
  //
  let id = e.currentTarget.dataset.id;

  //跳轉到classify 頁面
  wx.navigateTo({
    url: '../classify/classify?id=' + id
  })
}

//classify 頁面 獲取引數
onLoad: function (opts) {
  console.log(opts.id)
  console.log(this.options.id)
}