A repeater loop using the documentation from here http://www.advancedcustomfields.com/resources/have_rows/
if (have_rows('repeater_field')) {
// first loop
while(have_rows('repeater_field_name')) {
the_row();
// output sub field content
the_sub_field('sub_field_name');
}
// reset the rows of the repeater
reset_rows();
// second loop of same rows
while(have_rows('repeater_field_name')) {
the_row();
// output sub field content
the_sub_field('sub_field_name');
}
}