Online PHP editor | refs for nJ0bQl

<?php $menu = [ 1 => [ 'menuName' => 'Apps', 'menuUrl' => '/Apps', 'Invisible_Mode' => '', 'subMenu' => [ [ 'subMenuName' => 'Collaboration', 'subMenuUrl' => '/Apps/Collaboration', 'subitemCount' => 5, 'Invisible_Mode' => '' ], [ 'subMenuName' => 'Sales', 'subMenuUrl' => '/Apps/Sales', 'subitemCount' => 11, 'Invisible_Mode' => '' ], [ 'subMenuName' => 'Project Management', 'subMenuUrl' => '/Apps/Project-Management', 'subitemCount' => 5, 'Invisible_Mode' => '' ], [ 'subMenuName' => 'Human Resources', 'subMenuUrl' => '/Apps/Human-Resources', 'subitemCount' => 7, 'Invisible_Mode' => '' ], [ 'subMenuName' => 'Marketing', 'subMenuUrl' => '/Apps/Marketing', 'subitemCount' => 8, 'Invisible_Mode' => '' ] ] ] ]; var_export( array_map( function ($set) { $set['subMenu'] = array_column($set['subMenu'], null, 'subMenuName'); return $set; }, $menu ) );