JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrap">
    <nav>
        <a href="#">Активный пунк меню</a>
        <a href="#">Самый длинный пунк меню</a>
        <a href="#">Пунк меню</a>
        <a href="#">Пунк меню</a>
        <a href="#">Пунк меню</a>
        <a href="#">Пунк меню</a>
    </nav>
</div>

CSS

body{
    margin: 0;
}
.wrap{
    width: 1280px;
    height: 300px;
    margin: auto;
    position: relative;
    background: url(http://www.wallpaper77.com/upload/DesktopWallpapers/cache/Pattern-Blue-Vertical-Lines-background-patterns-pattern-wallpapers-1280x1024.jpg) no-repeat;
}
nav{
    width: 100%;
    height: 100px;
    position: absolute;
    bottom: 0;
}
nav a{
    height: 100px;
    float: left;
    padding: 0 10px;
    margin: 0 16px;
    background-color: #fff;
    line-height: 100px;
    position: relative;
    box-shadow: 0 13px #fff;
    color: #333;
}
nav a:before,
nav a:after{
    content: "";
    display: block;
    position: absolute;
    top: 0;
    right: 100%;
    width: 20px;
    height: 100px;
    background-color: #fff;
    z-index: 2;
}
nav a:after{
    left: 100%;
    background-color: #fff;
}
nav a:first-child{
    margin-left: 289px;
}nav a:first-child:before{
    width: 289px;
}
nav a:hover{
    border-radius: 0 0 15px 15px;
    background-color: transparent;
    color: #fff;
    text-decoration: none;
}
nav a:hover:before{
    border-radius: 0 15px 0 0;
}
nav a:hover:after{
    border-radius: 15px 0 0 0;
}