Something

<?
function getAccounts(){
	$query = mysql_query("SELECT id, username FROM `account` ORDER BY username ASC;");
	echo "<select>";
	while($row = mysql_fetch_assoc($query)){
		echo "<option name=\"".$row['id']."\">[".$row['id']."] ".$row['username']."</select>";
	}
	echo "</select>";
}
?>