Hello,

thank you, I found this post as very useful I made changes bellow it may helps anyone else:

<div class="td-header-rec-wrap">
<?php
// Custom ad for custom pages
if ( is_page( 'page1' ) OR has_category( 341 ) OR in_category( 341 ) OR is_category( 341 ) OR cat_is_ancestor_of( 341, $cat ) ) {
echo td_global_blocks::get_instance('td_block_ad_box')->render(array('spot_id' => 'custom_ad_1'));
} else {
// show the header ad spot
echo td_global_blocks::get_instance('td_block_ad_box')->render(array('spot_id' => 'header'));
}
?>
</div>


Thank you again.
Best regards,
Tim