Navigation ontwerp class / twig

<?php
/**
 * @author Tom Swinkels
 * @version v1.0 last edit on 31-10-2012
 */
class Navigation
{
    private $_id;
    private $_name;
    private $_url;

    public function setId( $id )
    {
        $this->_id = $id;
    }
    public function getId()
    {
        return $this->_id;
    }

    public function setName( $name )
    {
        $this->_name = $name;
    }
    public function getName()
    {
        return $this->_name;
    }

    public function setUrl( $url )
    {
        $this->_url = $url;
    }
    public function getUrl()
    {
        return $this->_url;
    }
}
?>

<?php
/**
 * @author Tom Swinkels
 * @version v1.0 last edit on 31-10-2012
 */
class NavigationMapper
{
    private $_db;

    public function __construct( PDO $db )
    {
        $this->_db = $db;
    }

    public function select( $place, $navigationId )
    {
        $sql = "SELECT
                      id,
                      name,
                      url,
                      module_id
                FROM
                      navigation
                WHERE
                      state_id = 1
                AND
                      navigation_id = :navigationId
                AND
                      place = :place
                ORDER BY
                      sort
                ASC
               ";

        $result = $this->_db->prepare( $sql );

        $data = array( 'navigationId' => $navigationId,
                       'place' => $place );

        $result->execute($data);

        $list = $result->fetchAll();
        if($list)
        {
            $navigations = array();
            foreach($list as $listArray)
            {
                $navigation = new Navigation();
                $navigation->setId($listArray['id']);
                $navigation->setName($listArray['name']);
                $navigation->setUrl($listArray['url']);
                $navigations[] = $navigation;
            }
            return $navigations;
        }
    }
}
?>

            {% if navigation.select( 'cms', '0' ) %}
                {% for nav in navigation.select( 'cms', '0' ) %}
                    <li class="limenu"><a href="{{ nav.getUrl() }}"><span class="ico gray shadow home" ></span><b>{{ nav.getName() }}</b></a>
                    {% if navigation.select( 'cms', nav.getId() ) %}
                        <ul>
                            {% for SubNav in navigation.select( 'cms', nav.getId() ) %}
                                <li><a href="{{ SubNav.getUrl() }}">{{ SubNav.getName() }}</a></li>
                            {% endfor %}
                        </ul>
                    {% endif %}
                    </li>
                {% endfor %}
            {% endif %}