$(document).ready(
    function() {
        var maxFavouriteHeight = Math.max($("div.favourite_1 div.favourite_text").height(), $("div.favourite_2 div.favourite_text").height());
        maxFavouriteHeight = Math.max(maxFavouriteHeight, $("div.favourite_3 div.favourite_text").height());
        maxFavouriteHeight = Math.max(maxFavouriteHeight, $("div.favourite_4 div.favourite_text").height());
        $("div.favourite_text").height(maxFavouriteHeight);
    }
);