I don't think I know enough about those tools to help you, and you don't understand my questions.

Your code is also very hard to read for me.

A general solution is to parse your tree data into a nested array of hashes and to traverse that to output your new format.

But I don't know if that's really necessary because I don't understand the data.

I hope someone with deeper knowledge of your domain will pass by and can help you. :)

update

see also

Re: Cisco to Juniper - parser help