How to sort data in etext template using a hard coded field

Summary:

We have a requirement to sort data using a record type element. this element is custom and is the first column of the level and not present in the xml file.

Please advise on how to sort data in etext template using a hard coded field in the layout which is not present in xml file?

We have record types 5,6,7, 8.

Currently for each run it prints like below

5 abc def

6efg hijk

7 ffr fwfw

5 abc1 def

6efg1 hijk

7 ffr1 fwfw

We want it to be like this below:

5 abc def

5 abc1 def

6efg hijk

6efg1 hijk

7 ffr fwfw

7 ffr1 fwfw