protected function _strip(array $nodes, array $wrapper = array()) {
        $parsed = '';

        if (!$nodes) {
            return $parsed;
        }

        foreach ($nodes as $node) {
            if (is_string($node)) {
                if (!$wrapper) {
                    $parsed .= $this->convertLineBreaks($node);
                } else {
                    $parsed .= $node;
                }
            } else {
                $parsed .= $this->getFilterByTag($node['tag'])->strip($node, $this->_strip($node['children'], $node));
            }
        }

        return $parsed;
    }