我自己的方法是:

$('a[accesskey]').each( //selects only those a elements with an accesskey attribute
    function(){
        var aKey = $(this).attr('accesskey'); // finds the accesskey value of the current a
        var text = $(this).text(); // finds the text of the current a
        var newHTML = text.replace(aKey,'<span class="access">' + aKey + '</span>');
        // creates the new html having wrapped the accesskey character with a span
        $(this).html(newHTML); // sets the new html of the current link with the above newHTML variable
    });

JS Fiddle演示.

参考文献:

• 具有属性选择器.
• attr() .
• replace()
• html()

• has-attribute selector.
• attr().
• replace()
• html()