Laravel 4 Artisan error when trying to install a bundle
If you're using Laravel 4 (which based on the tags for this question, you are) then bundles are no longer used.
Out with bundles, in with composer
Instead, Laravel 4 makes use of composer packages. It's kind of similar but at the same time very different in how it works. Here isn't the right place to explain all of composer, so check out the links below to find out more:
Laravel 4 Generator
Now, since you were asking about bob, the closest equivalent for the bob bundle would probably be Jeffrey Ways generator package, which you can learn more about here: Laravel-4-Generators