assign category

I have this code, but I can not filter by tag //Sorry not category

function post_grid_filter_query_args_extra($query_args){
	$cu = wp_get_current_user(); //usuario actual
	$valorC=xprofile_get_field_data('Ciudad',$cu->ID); //city tag, i used BuddyP.
  $extra_query = array (
      'post__not_in' => array('tag' => $valorC),
      );
  return array_merge($query_args, $extra_query);
  }
add_filter('post_grid_filter_query_args','post_grid_filter_query_args_extra');

• This reply was modified 8 years, 7 months ago by massimo_oddo.
• This reply was modified 8 years, 7 months ago by massimo_oddo.