Класс Group

class Group { … }

    var $node;

    var $label;

    var $title;

    function __construct($node) {
        $this->node = $node;
        $node->group = $this;
        $this->parseAttributes($node->attributes);
    }

    function parseAttributes($attributes) {
        foreach ($attributes as $attributeName => $attribute) {
            $this->set($attributeName, $attribute->value);
        }
    }

    function set($name, $value) {
        $this->$name = $value;
    }

    function display() {
        $Display = $this->Main()->Display();
        $Page = $this->Page();
        return $Display->callTemplate('field', 'group', $Page, array( 'Group' => $this, 'field' => $this ));
    }

    function App() {
        return \Cms\Site\App::getInstance();
    }

    function root() {
        return $this->App()->root();
    }

    function Conf() {
        return $this->App()->Conf();
    }

    function Data() {
        return $this->App()->Data();
    }

    function Auth() {
        return $this->App()->Auth();
    }

    function Main() {
        return $this->App()->Main();
    }

    function Form() {
        return $this->App()->Form();
    }

    function Page() {
        if ($this->node instanceof \DOMElement && $this->node->ownerDocument instanceof \DOMDocument) {
            /**
             * @if false
             * @var Document $ownerDocument
             * @endif
             */
            $ownerDocument = $this->node->ownerDocument;
            return $ownerDocument->Page;
        }
    }