array(4) {
  ["id"] => string(3) "342"
  ["name"] => string(6) "生态"
  ["url"] => string(48) "/ecosystem/zxjc/ncs?catids=343&atp=1"
  ["pid"] => string(1) "0"
}

array(4) {
  ["id"] => string(3) "343"
  ["name"] => string(12) "在线监测"
  ["url"] => string(30) "/ecosystem/zxjc/ncs?catids=343"
  ["pid"] => string(3) "342"
}

array(4) {
  ["id"] => string(3) "391"
  ["name"] => string(24) "MS-H 系列 重型云台"
  ["url"] => string(21) "/ecosystem/zxjc/mshzx"
  ["pid"] => string(0) ""
}