$domain = "http://www.yourdomain.com/";

$url = $PHP_SELF;

$url = explode('/',$url);

$links = array();

foreach($url AS $key->$value)
{
        $folder = "".$folder."/$value";
        $links[$value] = "/ <a href=\"$domain/$folder/\">$value</a> ";
};

foreach($links AS $key->$value)
{
echo " $value";
};