how to align text center and right

If you want the item to not mess with the layout, try absolute:

<div id="header" style="position:relative;text-align:center;"><!-- define relative so child absolute's are based on this elements origin -->
    <div id="sampleLink" style="position:absolute; top:0px; right:0px; >Link</div>
    <h1 style="text-align:center;">Heading</h1>
</div>