Symfony category and subcategory widget in one widget - symfony1

Question

I have two relations in my schema, product with many subcategory and product with many category. So I can make in my productForm.class.php
$this->widgetSchema['subcategory_list'] = new sfWidgetFormDoctrineChoice(array('model' => 'Subcategory', 'add_empty' => false, 'multiple' => true,'expanded' => true));
$this->widgetSchema['category_list'] = new sfWidgetFormDoctrineChoice(array('model' => 'Category', 'add_empty' => false, 'multiple' => true,'expanded' => true));
And it is work. But I need to make for example:
category1
subcategory 1 , subcategory2
category2
category3
subcategory3, subcategory4
And I need to make, that I can check category and subcategory.
Thank you!
Upd
Product:
actAs:
Timestampable: ~
Sluggable:
unique: true
canUpdate: true
fields: [name]
builder: [myTools, StripText]
I18n:
fields: [name,description,shortbody,meta_keywords,meta_description]
columns:
partner_id: { type: integer() }
active: { type: boolean, default: 0, notnull: false }
name: { type: string(255), notnull: true }
shortbody: { type: string(500), notnull: true }
description: { type: string(), notnull: true }
reference: { type: string(100), notnull: true }
code: { type: string(100), notnull: true }
delivery_period: { type: string(100), notnull: true }
shipping_volume: { type: string(100), notnull: true }
weight: { type: string(100), notnull: true }
packing: { type: string(100), notnull: true }
package_dimensions: { type: string(100), notnull: true }
type_of_packaging: { type: string(100), notnull: true }
video_url: { type: string(100), notnull: false }
meta_keywords: { type: string(255) }
meta_description: { type: string(255) }
relations:
Subcategory: { local: product_id , foreign: subcategory_id, refClass: ProductSubcategory }
Category: { local: product_id , foreign: category_id, refClass: ProductCategory }
Partner: { local: partner_id , foreign: id, onDelete: CASCADE }
ProductSubcategory:
connection: doctrine
columns:
subcategory_id: { type: integer(), primary: true}
product_id: { type: integer(), primary: true }
relations:
Product: { onDelete: CASCADE,local: product_id, foreign: id }
Subcategory: { onDelete: CASCADE,local: subcategory_id, foreign: id }
ProductCategory:
connection: doctrine
columns:
category_id: { type: integer(), primary: true}
product_id: { type: integer(), primary: true }
relations:
Product: { onDelete: CASCADE,local: product_id, foreign: id }
Category: { onDelete: CASCADE,local: category_id, foreign: id }
Category:
actAs:
Timestampable: ~
Sluggable:
unique: true
canUpdate: true
fields: [name]
builder: [myTools, StripText]
I18n:
fields: [name]
columns:
name: { type: string(255), notnull: true }
Subcategory:
actAs:
Timestampable: ~
Sluggable:
unique: true
canUpdate: true
fields: [name]
builder: [myTools, StripText]
I18n:
fields: [name]
columns:
category_id: { type: integer() }
name: { type: string(255), notnull: true }
relations:
Category: { onDelete: CASCADE,local: category_id , foreign: id }
ANSWER
I make it manual. I get from cache file _form.php and rewrite it, add category and subcategory checkbox. Than I make some changes in action class(manual set and delete subcategories and categories). I use code from answer, so I check it!

Answer 1

check this: http://www.symfony-project.org/jobeet/1_4/Doctrine/en/06
UPDATED:
you can simply in template:
$categories = CategoryTable::getInstance()->findAll();
foreach ($categories as $category) {
echo $category->getName();
$subcategory = SubcategoryTable::getInstance()->findBy('category_id', $category->getId());
foreach($subcategory as $sub){
echo $sub->getName();
}
}
this should working ok, but this isnt correctly programming