NORMAL

$(function(){
    $(".items1 li a").fixHeightSimple();
});

SET COLUMN

$(function(){
    $(".items2 li a").fixHeightSimple({
        column : 5
    });
});

RESPONSIVE

$(function(){
    $(".items3 li a").fixHeightSimple({
        responsive: true,
        responsiveParent: ".items3"
    });
});

RESPONSIVE × box-sizing: border-box

$(function(){
    $(".items4 li a").fixHeightSimple({
        responsive: true,
        responsiveParent: ".items4",
        boxSizingBorderBox: true
    });
});