How to create tree in php? -

i trying generate tree in php. here code it

$company = array();         $i = 1;         foreach($final_array3 $key => $value) {             array_push($company, $value);             $i++;         } 

main array is

array (     [ordinary income/expense] => array         (             [0] => stdclass object                 (                     [compid] => 1                     [coaid] => 12877                     [item] => ordinary income/expense                     [category] => 0                     [auto] => 0                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 1                 )              [1] => stdclass object                 (                     [compid] => 2                     [coaid] => 13571                     [item] => ordinary income/expense                     [category] => 0                     [auto] => 0                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 0                 )          )      [income] => array         (             [0] => stdclass object                 (                     [compid] => 1                     [coaid] => 12878                     [item] => income                     [category] => 12877                     [auto] => 1                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 1                 )              [1] => stdclass object                 (                     [compid] => 2                     [coaid] => 13572                     [item] => income                     [category] => 13571                     [auto] => 1                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 0                 )          ) ) 

and desired output is

array (     [ordinary income/expense] => array         (             [0] => stdclass object                 (                     [compid] => 1                     [coaid] => 12877                     [item] => ordinary income/expense                     [category] => 0                     [auto] => 0                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 1                     [children] => stdclass object(                                     [compid] => 1                                     [coaid] => 12878                                     [item] => income                                     [category] => 12877                                     [auto] => 1                                     [jan_2015_budget] => 0                                     [feb_2015_budget] => 0                                     [mar_2015_budget] => 0                                     [apr_2015_budget] => 0                                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                                     [istotal] => 0                                     [isparent] => 1                                 )                 )              [1] => stdclass object                 (                     [compid] => 2                     [coaid] => 13571                     [item] => ordinary income/expense                     [category] => 0                     [auto] => 0                     [jan_2015_budget] => 0                     [feb_2015_budget] => 0                     [mar_2015_budget] => 0                     [apr_2015_budget] => 0                     [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                     [istotal] => 0                     [isparent] => 0                     [children] => stdclass object(                             [compid] => 2                             [coaid] => 13572                             [item] => income                             [category] => 13571                             [auto] => 1                             [jan_2015_budget] => 0                             [feb_2015_budget] => 0                             [mar_2015_budget] => 0                             [apr_2015_budget] => 0                             [sum(if(`trl`.`entrydate` between '2016-1-01' , '2016-02-26', `trl`.`itemvalue`, 0))] => 0                             [istotal] => 0                             [isparent] => 0                         )                 )         ) ) 

so want make category tree. parent child relation coaid in stdclass object parent , category same coaid key in stdcalss object children.

now can please suggest me how this.tree can 5 level hierarchy.

thanks