Custom output for Json

Hi,
I need a custom output format for Json as my 3rd party javascript application requires that. Is there a way to get that done ?

Below is a sample format which I need it in.

[
{'title':'Heavy Metal', 'results': [
['/metal/1', 'Disturbed - The Game', 'icons/metal.png'],
['/metal/2', 'Marilyn Manson - The Beautiful People', 'icons/metal.png'],
['/metal/3', 'Soil - 2 Skins', 'icons/metal.png'],
['/metal/4', 'Alestorm - Wenches & Mead', 'icons/metal.png']
]},
{'title':'Pop', 'results':[
['/pop/1', 'Michael Jackson - Bad', 'icons/pop.png'],
['/pop/2', 'Britney Spears - If U Seek Amy', 'icons/pop.png'],
['/pop/3', 'Take That - Relight My Fire', 'icons/pop.png'],
['/pop/4', 'Rick Astley - Never Gonna Give You Up', 'icons/pop.png']
]},
{'title':'Folk', 'results':[
['/folk/1', 'The Proclaimers - I\'m Gonna Be', 'icons/folk.png'],
['/folk/2', 'Bob Dylan - Hurricane', 'icons/folk.png'],
['/folk/3', 'Jason Mraz - Geek In The Pink', 'icons/folk.png'],
['/folk/4', 'Beirut - Nantes', 'icons/folk.png']
]}
]

Cheers,
Vishal