I\'m to change it to support non-quote id, as in:
I found this http://www.sublimetext.com/forum/viewtopic.php?
You can find the HTML.tmLanguage file by going to /Applications and then control/right click on Sublime Text 2.app and select 'Show Package Contents'. Then navigate to /Contents/Mac OS/Pristine Packages/.
Inside that folder, you should see a collection of sublime-package files. Find HTML.sublime-package and rename it to HTML.zip. You should then be able to extract the archive, just like any other zip folder, and inside you should find all assests related to Sublime's HTML package - including the HTML.tmlanguage.
Make sure to recompress and then rename the folder back to .sublime-package after making your edits!
EDIT: I have since recognised that this is incorrect, the Pristine Packages should never be edited. Follow BoundinCode's answer instead!