Get user message id

I have 2 tables in my DB: users(id, pass, email) and messages(id, ownerid, text)

I want to allow each user to edit his own message(via ajax, but that doesn't matter right now).

The question is, after accessing all of an user's message

$STH = $DBH->prepare( "SELECT * FROM messages WHERE ownerid=:ownerid " );
//bind
$data = array( 'ownerid' => $_SESSION['id'] );
//exec
$STH->execute( $data );

while ( $results = $STH->fetch() ) {

    echo $results['text'];
}

I want to display them in editable textfields. The problem is that on clicking a certain textfield, how can I get the id of the message? I was thinking about including it in the html output, but that is not the most secure option.