Event handler for conditions
If you start with an array:

let certs = ["ncv", "cert", "express", "dealone", "iscustomer", "isecomm"];


then it reduces down to a for loop.

for (int i = 0; i &lt; certs.length; i++) {
    if ($this.data(certs[i])) {
        console.log(certs[i] + " is true");
        $tabbedMenu.eq(i).removeClass('hidden-item');
        $certsDescription.eq(i).removeClass('hidden-item');
    }
    else {
        $tabbedMenu.eq(i).addClass('hidden-item');
        $certsDescription.eq(i).addClass('hidden-item');
    }    
}