form_calculate ver 21-9 ( select option tk_co )

            <option value="">Chọn tài khoản có</option>
            <?php
            foreach ($list_tkdu_parents as $parent1){
                if($tk_co == $parent1['id']){?>
                    <option value="<?=$parent1['id']?>" selected="selected">
                        <?= $parent1['id'].'-'.$parent1['name'] ?>
                    </option>
                <?php
                }else{?>
                    <option value="<?=$parent1['id']?>">
                        <?= $parent1['id'].'-'.$parent1['name'] ?>
                    </option>
                <?php
                }
                $parents2 = $this->Tkdu->get_all_tk2_by_tk1($parent1['id'])->result();
                foreach ($parents2 as $parent2){
                    if($parent2->id == $tk_co){?>
                        <option value="<?=$parent2->id?>" selected="selected">
                            <?= '----'.$parent2->id.'-'.$parent2->name ?>
                        </option>
                    <?php
                    }else{?>
                        <option value="<?=$parent2->id?>">
                            <?= '----'.$parent2->id.'-'.$parent2->name ?>
                        </option>
                    <?php
                    }
                    $parents3 = $this->Tkdu->get_all_tk2_by_tk1($parent2->id)->result();
                    foreach ($parents3 as $parent3){
                        if($parent3->id == $tk_co){?>
                            <option value="<?=$parent3->id?>" selected="selected">
                                <?= '----.-----'.$parent3->id.'-'.$parent3->name ?>
                            </option>
                        <?php
                        }else{?>
                            <option value="<?=$parent3->id?>">
                                <?= '----.-----'.$parent3->id.'-'.$parent3->name ?>
                            </option>
                        <?php
                        }
                    }
                }
            }?>