{
   "categories":[
      {
         "id":1,
         "name":"cate 1",
         "sub_categories":[
            {
               "id":11,
               "name":"sub cate 11"
            },
            {
               "id":12,
               "name":"sub cate 12"
            }
         ]
      },
      {
         "id":2,
         "name":"cate 2",
         "sub_categories":[
            {
               "id":21,
               "name":"sub cate 21"
            },
            {
               "id":22,
               "name":"sub cate 22"
            }
         ]
      },
      {
         "id":3,
         "name":"cate 3",
         "sub_categories":[
            {
               "id":31,
               "name":"sub cate 31"
            },
            {
               "id":32,
               "name":"sub cate 32"
            }
         ]
      }
   ]
}