How to display a field in a model form to save data from it to a linked table?

Question

Yii

Colleagues. hello.
Began to study Yii 1.1.16
Faced a problem:
There are two related tables (models) - owner and number.
The owner holds the record ID from the number table, i.e. one line owner can match several numbers.
How to display on the page for creating a new owner instead of numberid a field that will be saved to the associated table number?
You need to change the code in _form.php, but how?

<?php
/* @var $this OwnerController */
/* @var $model Owner */
/* @var $form CActiveForm */
?>

<div class="form">

<?php $form=$this->beginWidget('CActiveForm', array(
  'id'=>'owner-form',
  // Please note: When you enable ajax validation, make sure the corresponding
  // controller action is handling ajax validation correctly.
  // There is a call to performAjaxValidation() commented in generated controller code.
  // See class documentation of CActiveForm for details on this.
  'enableAjaxValidation'=>false,
)); ?>

  <p class="note">Fields with <span class="required">*</span> are required.</p>

  <?php echo $form->errorSummary($model); ?>

  <div class="row">
    <?php echo $form->labelEx($model,'owner'); ?>
    <?php echo $form->textField($model,'owner',array('size'=>40,'maxlength'=>40)); ?>
    <?php echo $form->error($model,'owner'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'numberid'); ?>
    <?php echo $form->textField($model,'numberid'); ?>
        		<?php echo $form->error($model,'numberid'); ?>
  </div>

  <div class="row">
    <?php echo $form->dropDownList($model,'type', 
        Type::All(),
        array('empty' => '(Select a type)')
)       ;?>       
    <?php echo $form->error($model,'type'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'InfoData'); ?>
    <?php echo $form->textField($model,'InfoData',array('size'=>60,'maxlength'=>60)); ?>
    <?php echo $form->error($model,'InfoData'); ?>
  </div>

  <div class="row buttons">
    <?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?>
  </div>

<?php $this->endWidget(); ?>

</div><!-- form -->

What and how to change in this paragraph?

<div class="row">
    <?php echo $form->labelEx($model,'numberid'); ?>
    <?php echo $form->textField($model,'numberid'); ?>
        		<?php echo $form->error($model,'numberid'); ?>
  </div>

I understand that it is necessary to add a function to the Number model and calculate it here, but how and what function?
It is necessary to replace after with id with a field with a value. So that the new value is stored in the Number model.