jQuery Forum

jQuery Mobile only styles regular anchor links if you've explicitly told the framework to do so by adding the data-role="button" to your anchor tags.  If you want a regular hyperlink that isn't styled by jQuery Mobile you just don't include that attribute and jQuery Mobile doesn't modify the anchor styling.

See http://jquerymobile.com/demos/1.2.0/docs/buttons/buttons-types.html
If you don't want form input buttons to be styled as jQuery Mobile buttons then you either need to specify data-role="none" to the button element or data-enhance="false" to a parent/ancestor element.  See http://jquerymobile.com/demos/1.2.0/docs/forms/forms-all-native.html

This is where it helps if you're specific about your problem or concern.  jQuery Mobile doesn't convert your links to buttons automatically unless you tell it to as mentioned above.  You didn't specify that you just don't want the other general document style specifications applied to the link.

It's CSS.  It's not like jQuery Mobile is defining CSS in a manner that prevents defining your own preferred display style yourself.  If you don't like the way an element is styled you're free to change the style definitions to whatever you want.