PHP Was kann ich semantisch noch verbessern?

   <nav>
    <ul>
     <li class="current"><a href="index.html">Home</a></li>
     <li><a href="ueber_uns.html">Über uns</a></li>
     <li><a href="dienstleistungen.html">Dienstleistungen</a></li>
     <li><a href="referenzen.html">Referenzen</a></li>
     <li><a href="tutorials.html">Tutorials</a></li>
     <li><a href="downloads.html">Downloads</a></li>
     <li><a href="kontakt.html">Kontakt</a></li>
    </ul>
   </nav>

<?php

for($i = 0; $i <= 7; $i++) {
	$li[$i] = '';
}

if($_GET['section'] == 'home') {
	$li[0] = 'class="current"';
} elseif($_GET['section'] == 'about_us') {
	$li[1] = 'class="current"';
} elseif($_GET['section'] == 'services') {
	$li[2] = 'class="current"';
} elseif($_GET['section'] == 'reference') {
	$li[3] = 'class="current"';
} elseif($_GET['section'] == 'tutorials') {
	$li[4] = 'class="current"';
} elseif($_GET['section'] == 'downloads') {
	$li[5] = 'class="current"';
} elseif($_GET['section'] == 'contact') {
	$li[6] = 'class="current"';
}


echo "
   <nav>
    <ul>
     <li $li[0] ><a href=\"index.html\">Home</a></li>
     <li $li[1] ><a href=\"ueber_uns.html\">Über uns</a></li>
     <li $li[2] ><a href=\"dienstleistungen.html\">Dienstleistungen</a></li>
     <li $li[3] ><a href=\"referenzen.html\">Referenzen</a></li>
     <li $li[4] ><a href=\"tutorials.html\">Tutorials</a></li>
     <li $li[5] ><a href=\"downloads.html\">Downloads</a></li>
     <li $li[6] ><a href=\"kontakt.html\">Kontakt</a></li>
    </ul>
   </nav>";
   
?>

<?php
switch ($_GET['section']) {
    case 'home':
        $li[0] = 'class="current"';break;
    case 'about_us':
        $li[1] = 'class="current"';break;
    case 'services':
        $li[2] = 'class="current"';break;
}
?>

$menu = array(
  array('section' => 'uber', 'url' => 'ueber_uns.html', 'title' => 'Über uns'),
  array('section' => 'blah', 'url' => 'blah.html', 'title' => 'blah'),
);

$current = $_GET['section'];

echo '<nav><ul>';
foreach ($menu as $m) {
  $class = '';
  if ($current == $m['section'])
     $class = ' class="current"';
  echo '<li><a href="', $m['url'], '">', $m['title'], '</a></li>';
}
echo '</ul></nav>';

<?php

$menu = array(
	array(
		'section' => 'home',
		'url'     => 'home.html',
		'title'   => 'Home'
		),
	array(
		'section' => 'about_us',
		'url'     => 'about_us.html',
		'title'   => 'Über uns'
		),
	array(
		'section' => 'services',
		'url'     => 'services.html',
		'title'   => 'Dienstleistungen'
		),
	array(
		'section' => 'reference',
		'url'     => 'reference.html',
		'title'   => 'Referenzen'
		),
	array(
		'section' => 'tutorials',
		'url'     => 'tutorials.html',
		'title'   => 'Tutorials'
		),
	array(
		'section' => 'downloads',
		'url'     => 'downloads.html',
		'title'   => 'Downloads'
		),
	array(
		'section' => 'contact',
		'url'     => 'contact.html',
		'title'   => 'Kontakt'
		)
);

$current = $_GET['section'];

echo '<nav><ul>';
foreach($menu as $m) {
	$class = '';
	if ($current == $m['section'])
		$class = ' class="current"';
	echo '<li', $class, '><a href="', $m['url'], '">', $m['title'], '</a></li>';
	}
echo '</ul></nav>';
?>

<?php $currentcss = ' class="current"'; ?>
   <nav>
    <ul>
     <li<?php echo ($_GET['section'] === 'home' ? $currentcss : ''); ?>><a href="index.html">Home</a></li>
     <li<?php echo ($_GET['section'] === 'ueber_uns' ? $currentcss : ''); ?>><a href="ueber_uns.html">Über uns</a></li>
     <li<?php echo ($_GET['section'] === 'dienstleistungen' ? $currentcss : ''); ?>><a href="dienstleistungen.html">Dienstleistungen</a></li>
     <li<?php echo ($_GET['section'] === 'referenzen' ? $currentcss : ''); ?>><a href="referenzen.html">Referenzen</a></li>
     <li<?php echo ($_GET['section'] === 'tutorials' ? $currentcss : ''); ?>><a href="tutorials.html">Tutorials</a></li>
     <li<?php echo ($_GET['section'] === 'downloads' ? $currentcss : ''); ?>><a href="downloads.html">Downloads</a></li>
     <li<?php echo ($_GET['section'] === 'kontakt' ? $currentcss : ''); ?>><a href="kontakt.html">Kontakt</a></li>
    </ul>
   </nav>