用新值替换字符串值

I have two tables displaying our judges info. One for English the other for French. The last column shows the judges judging division, M = masters, A = Advanced and so on. Only the the first letter is displayed. My db has only the English so I need to change the value to French equivalent. The logic is like this.

$divStr = $row['JudgingLevel'];
if $divStr = "M" then $div = "E";
elseif $divStr = "A" then $div = "I" 
elseif $divStr = "S" then $div = "N";

echo $div;

What is the proper syntax for this?

TNX Bob

echo $div = strtr($divStr = $row['JudgingLevel'], array(
    'M' => 'E',
    'A' => 'I',
    'S' => 'N',
));

^ in one strike!