Bootstrap has added a new class from 3.0.

<div class="text-center">
    <ul class="pagination">
        <li><a href="?p=0" data-original-title="" title="">1</a></li> 
        <li><a href="?p=1" data-original-title="" title="">2</a></li> 
    </ul>
</div>

Bootstrap 4 has new class

<div class="text-xs-center">
    <ul class="pagination">
        <li><a href="?p=0" data-original-title="" title="">1</a></li> 
        <li><a href="?p=1" data-original-title="" title="">2</a></li> 
    </ul>
</div>

For 2.3.2

<div class="pagination text-center">
    <ul>
        <li><a href="?p=0" data-original-title="" title="">1</a></li> 
        <li><a href="?p=1" data-original-title="" title="">2</a></li> 
    </ul>
</div>

~~Give this way:~~

.pagination {text-align: center;}

~~It works becauseul is using inline-block;~~

~~Fiddle:http://jsfiddle.net/praveenscience/5L8fu/~~


~~Or if you would like to use Bootstrap's class:~~

<div class="pagination pagination-centered">
    <ul>
        <li><a href="?p=0" data-original-title="" title="">1</a></li> 
        <li><a href="?p=1" data-original-title="" title="">2</a></li> 
    </ul>
</div>

~~Fiddle:http://jsfiddle.net/praveenscience/5L8fu/1/~~