wrap-letters.js

/**
 * Wrap each letter of text in the given element in a span tag.
 */
$.fn.lettering = function () {
    this.each(function (index) {
        var elem = $(this),
            characters = elem.text().split("");

        elem.empty();

        $.each(characters, function (i, el) {
            elem.append('<span>' + el + "</span");
        });
    });

    return this;
};