PS Coding MAsk

Dear Expert ;

I am assign the Coding MAsk same As Below:

D /XXXX/0000/0000/0000

I want the setting same as below.

PD : NP/CT01/0001

WBS1 :NP/CT01/0001 - Level 1

WBS2 : NP/CT01/0001/0001: - level 2

but Presentally system provide

NP/CT01/0001 - Level 1

NP/CT01/00011- Level 2

Plz. Suggest the Setting with proper Flow.