var states = [
    "Alabana",
    "Alaska",
    "Arizona",
    "Arkansas",
    "California"
];
var data = [
    "Al",
    "Ak",
    "Ar",
    "Ark",
    "Cal"
]

$('.mdb-autocomplete').mdb_autocomplete({
    data: states
});

$('.mdb-autocomplete').on('mouseenter', function() {
    var index = jQuery.inArray($(this).val(), states);
        $(this).attr("data-value", data[index])
        console.log($(this).attr("data-value"));
})