well, do you know any css? You can use css to center the text. It depends on how you wrote your blog or how you set it up. You can view the source code of the page and see what class has been given to the pagination and then in your stylesheet you add that class and center the text

CSS:

div.pagination{display: table; margin: 0 auto;}

No effect on IE 6 or 7 though - You could see it as progressive enhancement.

@koko the pagination is dynamic in size and a set width will have to be given to the div wrapper.