You’re not going to be able to do this without some extremely complex coding.
Is there a reason that you’re using a table?
If a table is the only way you can do this then I would suggest putting each row of the repeater into html and then output that html in the order you want based on the number of rows.
$row_html = array();
while(have_rows('repeater')) {
the_row();
$index = get_row_index();
$row_html[$index] = '<div>';
$row_html[$index] .= get_sub_field('my_sub_field');
$row_html[$index] .= '</div>';
}
You’ll still need some creative logic, but at least you won’t be trying to do it inside of the loop.
