Desired result

array(2) {
  [0] => array(5) {
    ["pageid"] => string(1) "1"
    ["page_parent"] => string(1) "0"
    ["label"] => string(16) "Label one"
    ["uri"] => string(5) "index/uri-one/"
    ["pages"] => array(1) {
      [0] => array(4) {
        ["pageid"] => string(1) "5"
        ["page_parent"] => string(1) "1"
        ["label"] => string(4) "Label two"
        ["uri"] => string(6) "index/uri-one/uri-two/"
      }
    }
  }
  [1] => array(5) {
    ["pageid"] => string(1) "2"
    ["page_parent"] => string(1) "0"
    ["label"] => string(7) "Label Three"
    ["uri"] => string(7) "index/uri-three/"
    ["pages"] => array(1) {
      [0] => array(5) {
        ["pageid"] => string(1) "3"
        ["page_parent"] => string(1) "2"
        ["label"] => string(17) "Label four"
        ["uri"] => string(17) "index/uri-three/uri-four/"
        ["pages"] => array(2) {
          [0] => array(5) {
            ["pageid"] => string(1) "6"
            ["page_parent"] => string(1) "3"
            ["label"] => string(4) "Label five"
            ["uri"] => string(4) "index/uri-three/uri-four/uri-five/"
            ["pages"] => array(2) {
              [0] => array(4) {
                ["pageid"] => string(1) "7"
                ["page_parent"] => string(1) "6"
                ["label"] => string(6) "Label six"
                ["uri"] => string(6) "index/uri-three/uri-four/uri-five/uri-six/"
              }
              [1] => array(5) {
                ["pageid"] => string(1) "8"
                ["page_parent"] => string(1) "6"
                ["label"] => string(8) "Label seven"
                ["uri"] => string(8) "index/uri-three/uri-four/uri-five/uri-seven/"
                ["pages"] => array(2) {
                  [0] => array(5) {
                    ["pageid"] => string(2) "10"
                    ["page_parent"] => string(1) "8"
                    ["label"] => string(15) "Label eight"
                    ["uri"] => string(15) "index/uri-three/uri-four/uri-five/uri-seven/uri-eight/"
                    ["pages"] => array(1) {
                      [0] => array(4) {
                        ["pageid"] => string(2) "12"
                        ["page_parent"] => string(2) "10"
                        ["label"] => string(16) "Label nine"
                        ["uri"] => string(16) "index/uri-three/uri-four/uri-five/uri-seven/uri-eight/uri-nine/"
                      }
                    }
                  }
                  [1] => array(4) {
                    ["pageid"] => string(2) "11"
                    ["page_parent"] => string(1) "8"
                    ["label"] => string(12) "Label ten"
                    ["uri"] => string(12) "index/uri-three/uri-four/uri-five/uri-ten/"
                  }
                }
              }
            }
          }
          [1] => array(4) {
            ["pageid"] => string(1) "9"
            ["page_parent"] => string(1) "3"
            ["label"] => string(6) "Label eleven"
            ["uri"] => string(6) "index/uri-three/uri-four/uri-eleven/"
          }
        }
      }
    }
  }
}