#role-keyword{ width: 150px; float:left; } select#cmb-resource{ height: 28px; } div#res-user-list { font-size: 14px; } </style> <?php $resources = array(); $finalResource = array(); $rootList = $modules->listAccessModulesList(); $root = $rootList[0]; $child = $rootList[1]; $resultantData = array(); foreach ($child as $key => $element) { $access_tag = $element['access_tag']; $parent_id = $element['id']; foreach ($child as $key => $elementData) { if ($elementData['parent'] === $parent_id) { $element[$access_tag][] = $elementData; } } $resultantData[] = $element; } foreach ($root as $key => $rootElement) { $keys = array_keys($rootElement);