JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sbmts_bl">
    <a class="sbm_top_link fancybox" href="#">Интернет магазин Солана </a>
    <a class="sbm_top_link fancybox" href="#">Интернет магазин Арога</a>
</div>

CSS

.hover {
    color: #fff;
    background: #333333;
}

JavaScript

$(document).ready(function() {
    $('.sbm_top_link:last').hover(
        function() {
            $('.sbm_top_link:first').toggleClass('hover');
        },
        function() {
            $('.sbm_top_link:first').toggleClass('hover');
        }
    );
});