The speaker is trying to express that A and B are distinct from each other. Love is love. That is, true love doesn't care about money. On the other hand, money is money, and the speaker feels that love doesn't change how you feel about wealth. You might hear similar constructs like: "Boys will be boys, girls will be girls." The speaker is trying to express that boys and girls are different, and they are going to act like their peers (boys will act like boys, girls will act like girls, neither will act like the other group). Sean's answer is correct, if you see the A is A without the B is B after it.

When someone says “love is love,“ I believe that they mean it does not matter who you are, or who you love. For example, if two men are in love with one another, it does not matter because love is love.