怎么用JavaScript或css在thinkPHP的模板中显示树形结构

array(2) {  [0] => array(4) {    ["pid"] => string(1) "0"    ["id"] => string(1) "1"    ["name"] => string(9) "江西省"    ["son"] => array(2) {      [0] => array(3) {        ["pid"] => string(1) "1"        ["id"] => string(1) "2"        ["name"] => string(9) "南昌市"      }      [1] => array(4) {        ["pid"] => string(1) "1"        ["id"] => string(1) "3"        ["name"] => string(9) "赣州市"        ["son"] => array(1) {          [0] => array(3) {            ["pid"] => string(1) "3"            ["id"] => string(1) "4"            ["name"] => string(9) "大田乡"          }        }      }    }  }  [1] => array(4) {    ["pid"] => string(1) "0"    ["id"] => string(1) "6"    ["name"] => string(12) "黑龙江省"    ["son"] => array(1) {      [0] => array(3) {        ["pid"] => string(1) "6"        ["id"] => string(1) "5"        ["name"] => string(12) "哈尔滨市"      }    }  }}