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

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