$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
if ($s==Null) $this->_preg_error();
// remove comments block
$s = preg_replace('/{#[^#]*#}/', "" , $s);
$s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s);
if ($s==Null) $this->_preg_error();
// remove comments block
$s = preg_replace('/{#[^#]*#}/', "" , $s);