slide in slide out taken out of my theme

{block:iflinkstyle2}
<a href="#" class="barn">{text:navi label} <i class="fa fa-arrow-down" style="float:right"></i></a>
<div class="hidl">
    <i class="fa fa-home"></i> <a href="/">home</a><br>
    {block:AskEnabled}<i class="fa fa-envelope-o"></i> <a href="/ask">ask</a><br>{/block:AskEnabled}
    <i class="fa fa-folder-o"></i> <a href="{text:link 1}">{text:link 1 label}</a><br>
    <i class="fa fa-folder-o"></i> <a href="{text:link 2}">{text:link 2 label}</a><br>
    <i class="fa fa-folder-o"></i> <a href="{text:link 3}">{text:link 3 label}</a><br>
    <i class="fa fa-folder-o"></i> <a href="{text:link 4}">{text:link 4 label}</a>
</div>{/block:iflinkstyle2}

#sidebar .barn {
    display: block;
    {block:ifbordernavi}border: 1px solid {color:navi border};{/block:ifbordernavi}
    font-size: {text:navi text}px;
    width: 191px;
    padding: 5px;
    text-align: {select:navi align};
    letter-spacing: {text:navi spacing}px;
    background: {color:navi bg};
    margin: 5px 0;
    color: {color:navi text};
    font-family: {select:body font};
}
#sidebar .barn a, .barn a:visited, .barn a:active, .barn a:hover {
    color: {color:navi text};
    text-decoration: none;
}
#sidebar .hidl {
    text-align: left;
    display: inline-block;
    background: {color:navi bg};
    padding: 5px;
    margin: 5px 0;
    color: {color: navi text};
    font-size: {text:navi text}px;
        {block:ifbordernavi}border: 1px solid {color:navi border};{/block:ifbordernavi}
    width: 191px;
    font-family: {select:body font};
    line-height: 115%;
}
#sidebar .hidl a, .hidl a:visited, .hidl a:active {
    color: {color:navi link};
}
#sidebar .hidl a:hover {
    color: {color:navi link hover};
}

<!-- dropdown links -->
   <script type="text/javascript">
     jQuery(document).ready(function() {
     jQuery(".hidl").hide();
     //toggle the componenet with class msg_body
     jQuery(".barn").click(function(e) {
     e.preventDefault();
     jQuery(this).next(".hidl").slideToggle(500);
     });});
</script>