JA Tabs plugin could not support on this case, but you can customize on it.
Open /plugins/system/jatabs/jatabs.php file
On parseTabModules($params) function
From
$lis .= "<li title="" . strip_tags($list[$j]->title) . """ . ($clssfx ? " class="ja-tab-title$clssfx"" : "") . "><h3><span>" . JText::_($list[$j]->title) . "</span></h3></li>";
Change to
$lis .= "<li title="" . strip_tags($list[$j]->title) . """ . ($clssfx ? " class="ja-tab-title$clssfx"" : "") . "><h3><a href='#'><span>" . JText::_($list[$j]->title) . "</span></a></h3></li>";
And continue with parseTabModule, parseTabArticle function
Regards