Меню на CSS без модулей - Вопросы по CSS

<div id="mytopcontainer">		
	<div id="mytopmenu">
	<ul>
	<li><a href="" title="">Главная</a></li>
	<li><a href="" title="">Новости</a></li>
	<li><a href="" title="" class="current">Форум</a></li>
	<li><a href="" title="">О сайте</a></li>
	<li><a href="" title="">Контакты</a></li>
	</ul>
	</div>

/**** Верхнее меню START *****/
#mytopcontainer{height:24px;background:#000;display:block;padding:45px 0 0 15px;}
#mytopmenu{position:relative;display:block;height:24px;font-size:11px;font-weight:bold;font-family:Arial,Verdana,Helvitica,sans-serif;}
#mytopmenu ul{margin:0px;padding:0;list-style-type:none;width:auto;}
#mytopmenu ul li{display:block;float:left;margin:0 1px 0 0;}
#mytopmenu ul li a{display:block;float:left;color:#fff;text-decoration:none;padding:5px 20px 0 20px;height:19px;background:transparent url(../images/off.gif) no-repeat top left;}
#mytopmenu ul li a:hover{color:#fff;background:transparent url(../images/over.gif) no-repeat top right;}
#mytopmenu ul li a.current,#mytopmenu ul li a.current:hover{color:#000;background:#fff;}
/*******Верхнее меню END********/

<?php
$menu = <<<MENU
<ul id="nav">
    <li><a href="/" title="Where the heart is">Home</a></li>
    <li><a href="/archives/" title="Things that have passed.">Archives</a></li>
    <li><a href="/about/" title="All about Matt">About</a></li>
    </ul>
MENU;
$lines = split("\n", $menu);
foreach ($lines as $line) {
    $current = false;
    preg_match('/href="([^"]+)"/', $line, $url);
    if (substr($_SERVER["REQUEST_URI"], 0, 5) == substr($url[1], 0, 5)) {
        $line = str_replace('<a h', '<a id="current" h', $line);
        }
    echo $line."\n";
}
?>

$menuclass = 'mainlevel'. $params->get( 'class_sfx' );
		if (count( $links )) {
			switch ($style) {
				case 1:
					echo '<ul id="'. $menuclass .'">';
					foreach ($links as $link) {
						echo '<li>' . $link . '</li>';
					}
					echo '</ul>';
					break;

$menuclass = 'mainlevel'. $params->get( 'class_sfx' );
		if (count( $links )) {
			switch ($style) {
				case 1:
					echo '<ul id="'. $menuclass .'">';
                    foreach ($links as $link) {
                    if (strpos($link,'id="active_menu')){
                        $id = 'id="active_menu'. $params->get( 'class_sfx' ) .'"';
                    }
                    else{
                        $id='';
                    }
                    echo '<li '.$id.'>' . $link . '</li>';
                }
                echo '</ul>';
					break;