array(4) {
  ["id"] => string(2) "14"
  ["name"] => string(12) "解决方案"
  ["url"] => string(10) "/solutions"
  ["pid"] => string(1) "0"
}

array(4) {
  ["id"] => string(2) "58"
  ["name"] => string(12) "建筑暖通"
  ["url"] => string(15) "/solutions?tp=3"
  ["pid"] => string(2) "14"
}

array(4) {
  ["id"] => string(3) "305"
  ["name"] => string(12) "暖通空调"
  ["url"] => string(29) "/solutions/building-hvac/hvac"
  ["pid"] => string(0) ""
}