Prehladavanie Array a jeho usporiadanie

$pages = '<li><a href="http://www.example.com/x1/">Počitace</a></li>
          <li><a href="http://www.whitehouse.gov/ddd/bbb/">Auticka</a></li>
          <li><a href="http://www.whitehouse.gov/eeee/aaaa/">jedlo</a></li>
          <li><a href="http://www.whitehouse.gov/yyy/zzz/">Zelené lesy</a></li>
          <li><a href="http://www.whitehouse.gov/yyy/xxx/">Mravce</a></li>
          <li><a href="http://www.whitehouse.gov/5455/">Zuby</a></li>
          <li><a href="http://www.whitehouse.gov/468/">Rubíny</a></li>';

$array = explode('</li>', $pages);
unset($array[count($array)-1]);
foreach($array as $key => $value){
  unset($array[$key]);
  $array[strtolower(strip_tags($value))] = $value.'</li>';
}
ksort($array);
echo implode($array);

$pages = '<li><a href="http://www.example.com/x1/">Počitace</a></li><li><a href="http://www.whitehouse.gov/ddd/bbb/">Auticka</a></li><li><a href="http://www.whitehouse.gov/eeee/aaaa/">jedlo</a></li><li><a href="http://www.whitehouse.gov/yyy/zzz/">Zelené lesy</a></li><li><a href="http://www.whitehouse.gov/yyy/xxx/">Mravce</a></li><li><a href="http://www.whitehouse.gov/5455/">Zuby</a></li><li><a href="http://www.whitehouse.gov/468/">Rubíny</a></li>';

preg_match_all('/<li><a href="([^"]+)">([^<>]+)<\/a><\/li>/', $pages, $matches);

asort($matches[2]);

print_r($matches);