//buat fungsi di bawah, untuk mengkonversi 2 dimensi (non-flat) array menjadi 1 dimensi (flat)
function convert_to_flat_array($non_flat) { //$non_flat = $this->bhn
    $objTmp = (object) array('aFlat' => array());
    array_walk_recursive($non_flat, create_function('&$v, $k, &$t', '$t->aFlat[] = $v;'), $objTmp);
    $flat = $objTmp->aFlat;
    return $flat;
}

/************ FOREACH **************/

<? $bhn_flat = convert_to_flat_array($this->bhn); ?>
<? foreach($this->bahan as $k => $v): ?>
<?
$checked = '';
if(in_array($v['brg_id'], $bhn_flat)) $checked = ' checked';
?>
<tr class="<?= $i % 2==0?"zebra":""?>">

<td align="center"><input type="checkbox" value="<?= $v['brg_id'] ?>" name="brg_id[]" id="brg_id" <?= $checked ?>>

</td>
<td align="left"><?= $v['brg_nama'];?></td>
<td align="left"><?= $v['brg_kode']; ?></td>
<td align="left"><select name="satuan[]" id="satuan<?= $v['brg_id'] ?>" disabled="true" class="required"><?=$this->satuan?></select><?=$this->warning('*')?></td>
</tr>
<?$i++; ?>
<? endforeach; ?>