Something

<?php
    require 'includes/start.php';
    $ru = $_SERVER['REQUEST_URI'];
    if ($ru == '/')
        $ru = '/index.html';
    $page = DBO::get('cms', 'pages', 'path', $ru);
    if ($page)
        $TITLE = $page['title'];
    else
        $TITLE = 'Page Not Found';
    require 'includes/header.php';
?>
<?php
    if ($page)
        echo $page['content'];
    else {
?>
    <br />
    <p>We're sorry, the page you are looking for could not be located. Please try again.</p>
<?php
    }
?>
<?php
    require 'includes/footer.php';
?>