Create a PHP array of the Thomson Reuters Business Classification Scheme

The 2012 Thomson Reuters Business Classification is a hierarchical business sector classification .

We have a legacy file based on the old 2009 classification which includes sector code, name and description. (sectors.php.txt - I couldn't upload a php file... so have suffixed with .txt)

We need the hierarchy updated to the 2012 classification schema (TRBC New.pdf) - some levels have changed, some levels have been added, some levels deleted.

The new hierarchy contains an extra level to the hierarchy which needs added (TRBC Extra Level.pdf).

All the necessary files are attached. The output must be a PHP file in the same format as sectors.php.

This shouldn't be more than a few hours work.