text: var treeData = [
  	{id:1,title:'一级菜单',pid:0},
  	{id:2,title:'二级单01',pid:1},
  	{id:3,title:'二级单02',pid:1},
  	{id:4,title:'二级单03',pid:1},
  	{id:5,title:'一级菜单02',pid:0},
  	{id:6,title:'二菜单01',pid:5},
  	{id:7,title:'三菜单01',pid:6},
  	{id:8,title:'三菜单02',pid:6},
  	{id:9,title:'四级菜单01',pid:8},
  	{id:10,title:'四级菜单02',pid:8},
  	{id:11,title:'二级菜单01',pid:5},
  	{id:12,title:'二级菜单02',pid:5},
  	{id:20,title:'一级菜单03',pid:0},
  	{id:21,title:'一级菜单03',pid:20}
  ]
  