gistfile1.aw

/// было
$select = $table->select()
  ->where('parent_id = ?', $this->_post->getId())
  ->order('time');

$repliesXml = '';
foreach ($select->fetchAll() as $item) {
  $repliesXml .= $item->getFullXml();
}

/// стало

$table = new Message_Post();
$mapper = $table->getMapper();
$replies = $mapper->withParent($this->_post->getId())->fetchAll();

$repliesXml = '';
foreach ($replies as $item) {
  $repliesXml .= $item->getFullXml();
}