Bootstrap Carousel With OptionTree Slider

I need a code as follows: for optiontree slider

<?php
if(is_first_slider) {
   echo "active";
}
?>

Why do you need such a thing you say to me 🙂 of course for bootstrap
I hate class=”active” 🙁
http://prntscr.com/7x6ak6

https://ww.wp.xz.cn/plugins/option-tree/