Custom, database-driven 404 page -- can this be improved?

[eluser]arlodesign[/eluser]
[quote author="wiredesignz" date="1216064565"]Actually your code is ok. Extending the CI core is always a hack in most cases, but so long as it works for you and it doesn't interfere with other CI libraries it's all good.[/quote]

Thanks for assuaging my guilt. I still know it can be done better, but at least I know I haven't done anything asinine.