[eluser]rufnex[/eluser]
You can do something like that:
Code:
<select name="prevention[]" id="prevention" class="form-control dd ff" placeholder="Select 1 or more options" multiple="multiple">
<?php foreach($processes->data as $process){ ?>
<option value="<?php echo $process->processID; ?>"<?php if(in_array($process->processID, set_value('prevention[]'))): ?> selected="selected"<?php endif; ?>> <?php echo $process->process; ?></option>
<?php } ?>
</select>
It preselects the values after a submit vaild tested with the validation library.