View file Web Template Ktpl/package/templates/ktpl/assets/fields/listgroups.tpl.php

<?php if ($field->title) { ?><label for="<?php echo $field->id; ?>"><?php echo $field->title; ?></label><?php } ?>
<?php echo html_select_multiple($field->element_name, $field->data['groups'], $value, array('id'=>$field->id)); ?>

<script type="text/javascript">
    $(function() {
        $('#<?php echo $field->id; ?> input').on('click', function (){
            v = $(this).val();
            p = $(this).parents('.input_checkbox_list');
            if(v==0){
                $('input', p).not('input[value="0"]').prop('checked', false);
            } else {
                $('input[value="0"]', p).prop('checked', false);
            }
        });
    });
</script>