I figured it out for myself. Rather than jack with any java, I build a conditional switch, and used the .CSS ui-tabs-selected instead. Now, whatever day of the week it is, that tab will display first. And whomever voted me down can kiss my ass.
function tabs() {
$day = date("D");
switch ($day) {
case Mon:
$show1 = 'ui-tabs-selected';
break;
case Tue:
$show2 = 'ui-tabs-selected';
break;
case Wed:
$show3 = 'ui-tabs-selected';
break;
case Thu:
$show4 = 'ui-tabs-selected';
break;
case Fri:
$show5 = 'ui-tabs-selected';
break;
case Sat:
$show6 = 'ui-tabs-selected';
break;
case Sun:
$show7 = 'ui-tabs-selected';
break;
}
?>
<div id="tabs">
<ul>
<li class="<?php echo $show1; ?>"><a href="#tabs-1">Mon</a></li>
<li class="<?php echo $show2; ?>"><a href="#tabs-2">Tue</a></li>
<li class="<?php echo $show3; ?>"><a href="#tabs-3">Wed</a></li>
<li class="<?php echo $show4; ?>"><a href="#tabs-4">Thur</a></li>
<li class="<?php echo $show5; ?>"><a href="#tabs-5">Fri</a></li>
<li class="<?php echo $show6; ?>"><a href="#tabs-6">Sat</a></li>
<li class="<?php echo $show7; ?>"><a href="#tabs-7">Sun</a></li>
</ul>