How to remove the suffix of the textDisplay of all multipliers generated from schematic

Hi experts,

    I've tried to remove the suffix of  the textDisplay of all multipliers generated from schematic, 

e.g. a device M1 with M=4 the textDisplay shown on layout will be M1.1, M1.2, M1.3 & M1.4.

How do I remove the .* to make all of them M1, M1, M1 & M1?

    I tried to use rexReplace, but it can't recognize theLabel as a string. Is there any suggestion to do this?

Thanks.