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[quote author=mrshelly link=topic=16604.msg28963#msg28963 date=1410509466]现在左侧的菜单不就是折叠的么?[attachimg=1][attachimg=2][attachimg=3][/quote]这个好像是三级或分更多级会自动折叠吧，我要的是：如你图上所示点击“You know”折叠他的子菜单感谢你的回答。