Page({
  mapData:[
    [{id:11},{id:12}],
    [{id:21},{id:22}],
    [{id:31},{id:32},{id:33}]
  ]
})

<view class="container">
    <view class="map">
        <view wx:for="{{mapData}}">
            <view wx:for="{{item}}">
                {{item.id}}
            </view>
        </view>
    </view>
</view>

Page({
  mapData:[
    [{id:11},{id:12}],
    [{id:21},{id:22}],
    [{id:31},{id:32},{id:33}]
  ]
})

<view class="container">
    <view class="map">
        <view wx:for="{{mapData}}">
            <view wx:for="{{item}}">
                {{item.id}}
            </view>
        </view>
    </view>
</view>