超市 服务 电视机 手机， 这些数据如何分别放进数组里然后存进数据库的一个字段，
每个店后台更新这数据
然后怎么读取出来放到导航里
或者给个可以通过后台数据库更改数据的导航菜单，二级导航里的数据不限；
每个店的商品的种类是不同的输出二级导航的内容也不同
能正常显示
能正常操作
能正常跳转店铺
数据不丢失
回复讨论(解决方案)
楼主要这个干嘛，是完成老师的作业？如果自己想学php的话，自己通过实践可以学到很多东西的哦。
先mark一下，晚上晚上回去帮你弄一个。
二级导航为数组
我很笨，我不会猜谜语
假设有100个店，每个店铺的商品数量不同的，怎样把这些店铺的商品分类名称用数组放到他们放商品分类名称的字段里，并且能在导航菜单里显示商品分类名称，通过点击商品分类名称显示对应的商品类别。就是未注册的用户登录网站点击a店铺a的导航里显示a的商品分类名称，点击b店铺b的导航里显示b的商品分类名称。
好几天了怎么做
tb_member（表）
字段：mid（id） shopname（店铺名） ShangPinFenLei（商品分类)
1 a店铺 这里放有10件商品分类名称
2 b店铺 这里放有13件商品分类名称
3 c店铺 这里放有6件商品分类名称
4 d店铺 这里放有12件商品分类名称、
...............................
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