Pin Naming

You could edit the .qsf file.

It contains lines like

set_location_assignment PIN_K2 -to pin_d3_0[0]

set_location_assignment PIN_J2 -to pin_d3_0[1]

set_location_assignment PIN_L4 -to pin_d3_0[2]

set_location_assignment PIN_J4 -to pin_d3_0[3]

set_location_assignment PIN_H2 -to pin_d3_0[4]

set_location_assignment PIN_G2 -to pin_d3_0[5]

set_location_assignment PIN_G3 -to pin_d3_0[6]

set_location_assignment PIN_F2 -to pin_d3_0[7]

Make sure the project isn't already open in Quartus or you may lose your changes.

The file header reads

# Altera recommends that you do not modify this file. This

# file is updated automatically by the Quartus II software

# and any changes you make may be lost or overwritten.

So do this at your peril ;)