Edit the tabs in the data
I wish you could customize the labels to match your companies needs.
Custom fields is live so you can edit add custom labels and data fields to Contacts and Jobs.
You can set these up in Account Settings using the Contact Fields and Job Fields tabs. Please let me know if you need help setting this up and if you need something more for this.
See our tutorial here to get started: http://www.jobnimbus.com/blog/2013/09/06/how-to-set-up-and-use-custom-fields/