Sort objects hierarchically in recursive multidimensional arrays in Yii

recursive_sort_yii.php

<?php
$sections = Section::model()->findAll(
    array('order'=>'parent ASC NULLS FIRST,"order"'));  //PostgreSQL FTW
$entryRecords = array();
$entryPaths = array();
foreach ($sections as $section) {
	$section->children = array();
    $entryPaths[$section->id] = array();
    if ($section->parent === NULL) {
        $entryRecords[$section->order] = $section;
    } else {
    	$pathRef =& $entryRecords;
        foreach ($entryPaths[$section->parent] as $path) {
    		$pathRef =& $pathRef[$path]->children;
    	}
        $pathRef[] = $section;
        $entryPaths[$section->id] = $entryPaths[$section->parent]; 
    }
    $entryPaths[$section->id][] = $section->order;
}