Add simple field column to the posts screen
Ref. https://codex.wordpress.org/Plugin_API/Action_Reference/manage_posts_custom_column Just use the WP built in action called “manage_posts_custom_column” and in callback check for the correct column and add simple_field value with the function simple_fields_value : add_action( ‘manage_posts_custom_column’ , ‘add_new_column_data_in_posts’, 10, 2 ); function add_new_column_data_in_posts( $column, $post_id ) { switch ( $column ) { case ‘premium’ : echo simple_fields_value(“simple_field_slug”, $post_id); break; } }