How to set default value for TV in catalogfill?

Question

PHP

Hello!
While testing only on export.
I'm trying to import and export under the Yandex market, I've come across the fact that the tv values ​​​​are not substituted by the mind.
For example, I have only one currency, rubles. Then there is no point in making a list. Made a hidden field with RUR value by default. When importing, there is not RUR but empty. I tried to write the same $cf_config['imp_content_default'] here, and it's empty again.
What is the problem?
https://yandex.ru/support/partnermarket/yml/about-...

//разбивка по столбцам при импорте и экспорте (content|tv|category)
$cf_config['content_row'] = array(
    array('id',array('id','content')),
    array('available',array('published','content')),
    array('url',array('uri','content')),
    array('price',array(1,'tv')),
    array('currencyId',array(24,'tv')),
    array('picture',array(3,'tv')),
    array('category',array('parent','content')),
    array('name',array('pagetitle','content')),
    //array('description',array('introtext','content')),
    array('description',array('content','content'))
);

//значения по умолчанию при импорте или проверка при экспорте
$cf_config['imp_content_default'] = array(
    'content' => array(
        'deleted' => 0,
        'published' => 1,
        'template' => 3
        //'createdon' => strtotime("now")
        //'publishedon' => strtotime("now")
        //'pub_date' => strtotime("now")
        //'editedby' => 1
        //'editedon' => strtotime("now")
    ),
    'tv' => array(
        24 => 'RUR'
    )
);

Is it still possible to write the name of the site somewhere so that the paths to the page or file are complete?
https://yandex.ru/support/partnermarket/offers.xml
tried like this:

function filter_export($value_arr,$doc_id=0){
    $output_arr = $value_arr;
    if(isset($output_arr['content']['uri']))
      $output_arr['content']['uri'] = 'https://'.$_SERVER['SERVER_NAME'].$output_arr['content']['uri'];
    return $output_arr;
}

so:

if($output_arr['content']['id']){
      $output_arr['content']['id'] = 'https://'.$_SERVER['SERVER_NAME'].$output_arr['content']['parent'];
    }
    return $output_arr;