Hello, I've decided to publish some of classes, I've written. I can share just these, I hasn't made as a part of my paid job.
All code is licensed under this BSD-like license
It is a class, which can load array with data in single parental structure like:
$a = array();
$a[] = array('id' => 1, 'idp' => 0, 'text' => 'foo');
$a[] = array('id' => 2, 'idp' => 1, 'text' => 'bar');
into multidimensional array.
It can be downloaded here (in the gzipped tar)