Break the column by delimiter to distribute the values among rows.

There are 2 columns in a row for my table. One is the key and other is the value.
The value can be single or multiple. If multiple, they are separated by <br>. Like:

K1 -> V1 <br> V2 <br> V3

Now I want to export this into an Excel file such that there will be a single row for each value. Like:

K1 -> V1
K1 -> V2
K1 -> V3

I want to do this using datatables but cannot find any success. Can anyone help plz.