optionwidgets_validate($element, &$form_state)
contributions/cck/modules/optionwidgets/optionwidgets.module, line 312
FAPI function to validate optionwidgets element.
Transpose selections from field => delta to delta => field, turning multiple selected options into multiple parent elements. Immediate parent is the delta, need to get back to parent's parent to create multiple elements.
<?php
function optionwidgets_validate($element, &$form_state) {
$field = $form_state['#field_info'][$element['#field_name']];
$updated = optionwidgets_form2data($element, $field);
form_set_value($element, $updated, $form_state);
}
?>