5 column footer

Hello,

Please, how can I change count of columns in footer? I can divide it to max 4 in admin. I tried in inspector for html to change from col span_1_of_4 to col span_1_of_6 and it works.

Is it possible somehow to add in code 5th column or any ideas how to achieve this? I would like to have this:

col span_1_of_6
col span_1_of_6
col span_1_of_6
col span_1_of_6
col span_2_of_6

Thank you very much.