When uploading an invoice, you can add as many line items as you need in order to code across one or more categories.
Log in to Divvy and select Bill Pay from the left menu.
Select Invoices from the top menu.
In the top right, click New Invoice.
Edit the relevant fields and Select Budget.
Click Add Line Item to customize amounts to multiple categories.
Click Save Invoice.
While invoices can be split across categories, currently invoices cannot be split across budgets.