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) "59"
  ["name"] => string(12) "公共安全"
  ["url"] => string(15) "/solutions?tp=4"
  ["pid"] => string(2) "14"
}

array(4) {
  ["id"] => string(2) "68"
  ["name"] => string(12) "警用执法"
  ["url"] => string(40) "/solutions/public-safety/law-enforcement"
  ["pid"] => string(0) ""
}