How to generate daily MCIP output

Hi All,
I run mcip version of 5.1 to process WRF outputs to CMAQ format-ready files. I have wrfout files contain 7 days of data. How could I get daily MCIP output (CMAQ needs daily files as inputs). My current program automatically combined MCIP output to merged files. Anyone knows how to modify them to daily results. Thanks.

Best,
K