foreach ($rubrics as $rubric) {
	$children = array();
	foreach ($rubric->getChildren() as $childRubric) {
		$children[] = array('id' => $childRubric->idtopcat, 'name' => $childRubric->catname);
	}
	$row = array('id' => $rubric->idtopcat, 'name' => $rubric->catname, 'children' => $children);
	$treeData[] = $row;
}