select 

 `id` as `№ п/п`
,`name` as `Имя`

from `table` 

public function build_header(){
  $this->result=mysql_query($this->sql,$GLOBALS["link"]) or die(mysql_error());
		
  $header='<tr>';
  while(...){
    $header.='<td>'.$column_name.'</td>';
  }
  $header.='</tr>';
		
  return $header; 
}

	public function build_header(){
		
		$header='<tr>';
		if(mysql_num_rows($this->result)>0){
			$this->numfields=mysql_num_fields($this->result);
			for($this->i=0; $this->i < $this->numfields; $this->i++){
				$header.='<td>'.mysql_field_name($this->result, $this->i).'</td>';
			}
		}
		$header.='</tr>';
		
		return $header;
	}