CGridOptions::SetColumns

public function SetColumns($columns)
{
	$aColsTmp = explode(",", $columns);
	$aCols = array();
	foreach($aColsTmp as $col)
		if(($col = trim($col)) <> "")
			$aCols[] = $col;
	$this->all_options["views"][$this->currentView]["columns"] = implode(",", $aCols);
}