If you edit the code (on Blogger, click on EDIT HTML) when editing the layout, you can change those links. Scroll through the code. In green, you’ll see a part of the code labeled, “Menu,” (at the beginning, there’s a part labeled “Menu” in black–don’t change that).
You’ll see the addresses for those links there. Change the URLs only.
It looks like the labels aren’t text, but jpeg files, which means you’ll have to edit those files to say what you want, or create a new image to go in its place. Then upload and change the part of the code that tells the site where to get the image.
If you have questions about what I’m talking about, I’ll be glad to add more details (or perhaps someone who is better at explaining this can help).