Mine

<?
#MENU
echo "<ul>";
$dirname = "pages";
$dh = opendir($dirname) or die ("The documents directory is currently inaccessable. Please contact the system administrator"); 

while (!(($file = readdir($dh)) === false ) ) { 
    if ( !is_dir("$dirname/$file") ) {
	
	if(ereg("^[a-zA-Z0-9 _\.\-]+\.txt$", $file) == true){
		$filenamearray = explode('.', $file);
		$filenameraw = $filenamearray['0'];
		$filename = explode("_", $filenameraw);
		$filename = implode(" ", $filename);
		echo "<li><a href=\"index.php?content=$filenameraw\" title=\"$filename\" /><div class=\"navlink\">&nbsp; &raquo;&nbsp; $filename</div></a></li>";
	}
}
}
closedir($dh);
echo "</ul>";

?>