How to Scroll nav-pills (Bootstrap 3) horizontally?

问题

I am using the new Bootstrap 3 for nav-pills and I want to make all the pills stay in one horizontal line that can be scrolled (no wrap, even in title of every pill). even for 3 pills because I am trying that for small screen. like smartphones.

I tried some solutions:
Scroll Bootstrap 4 nav-tabs horizontally
Bootstrap horizontal scrollable tab bar

but I could not make it up. you can see my problem in my website page:

https://karneta.com/downloads/how-to-create-an-audience-persona/

Please help out to solve that.

HTML

    <div class="singleinfos">
        <div class="row container-fluid ">
                <div class="singleinfostabs">
                    <ul class="nav nav-pills">
                        <li class="active"><a data-toggle="pill" class="moretab" href="#cootab11">سرفصل های دوره</a></li>
                        <li><a data-toggle="pill" class="moretab" href="#cootab12">نمونه های دوره</a></li>
                        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
                    </ul>
                </div>
                <div class="tab-content">
                    <div id="cootab11" class="tab-pane fade in active sarfasldowre">

                        Text One

                    </div>

                    <div id="cootab12" class="tab-pane fade">

                        Text Two

                    </div>

                    <div id="cootab13" class="tab-pane fade">

                        Text Three

                    </div>
                </div>
        </div>
    </div>

</div>

CSS

.singledowre {
    background-color: transparent;
    min-height: 100%;
    padding: 40px 14px;
    background-image: url(img/shapes.png) !important;
    background-size: 17%;
}
.singledowrediv {
    display: table;
    margin: 0 auto;
    max-width: 950px;
}
.singleinfos {
    background: white;
    padding: 10px;
    border-radius: 8px;
    margin: 15px 0;
}
.container-fluid {
    padding-right: 0 !important;
    padding-left: 0 !important;
    margin-right: 0 !important;
    margin-left: 0 !important;
}
.singleinfos .singleinfostabs {
    margin-bottom: 20px;
}
.singleinfos .singleinfostabs > ul {
    display: flex;
    width: 100%;
    margin-bottom: 14px;
}
.singleinfos .singleinfostabs > ul > li {
    background: white;
    background: #869daf;
    border-radius: 3px;
    padding: 12px 0;
    width: 100%;
    margin-left: 10px;
    margin-right: 0;
    margin-bottom: 20px;
}
.singleinfos .singleinfostabs .nav-pills > li > a {
    font-size: 13px;
    border-radius: 4px;
    padding: 4px 10px;
    text-align: center;
    background: transparent;
    color: white !important;
}

回答1:

Replace following css with your css. & then check it.

.singledowre {
    background-color: transparent;
    min-height: 100%;
    padding: 40px 14px;
    background-image: url(img/shapes.png) !important;
    background-size: 17%;
}
.singledowrediv {
    display: table;
    margin: 0 auto;
    max-width: 950px;
}
.singleinfos {
    background: white;
    padding: 10px;
    border-radius: 8px;
    margin: 15px 0;
}
.container-fluid {
    padding-right: 0 !important;
    padding-left: 0 !important;
    margin-right: 0 !important;
    margin-left: 0 !important;
}
.singleinfos .singleinfostabs {
    margin-bottom: 20px;
	width: 100%;
}
.singleinfos .singleinfostabs > ul {
     overflow-x: auto;
   overflow-y:hidden;
   flex-wrap: nowrap;
    margin-bottom: 14px;
}
.singleinfos .singleinfostabs > ul > li {
    background: white;
    background: #869daf;
    border-radius: 3px;
    padding: 12px 0;

    margin-left: 10px;
    margin-right: 0;
    margin-bottom: 20px;
}
.singleinfos .singleinfostabs .nav-pills > li > a {
    font-size: 13px;
    border-radius: 4px;
    padding: 4px 10px;
    text-align: center;
    background: transparent;
    color: white !important;
	white-space: nowrap !important;
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">

<div class="singleinfos">
  <div class="row container-fluid ">
    <div class="singleinfostabs">
      <ul class="nav nav-pills">
        <li class="active"><a data-toggle="pill" class="moretab" href="#cootab11">سرفصل های دوره</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab12">نمونه های دوره</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
        <li><a data-toggle="pill" class="moretab" href="#cootab13">توضیحات بیشتر</a></li>
      </ul>
    </div>
    <div class="tab-content">
      <div id="cootab11" class="tab-pane fade in active sarfasldowre"> Text One </div>
      <div id="cootab12" class="tab-pane fade"> Text Two </div>
      <div id="cootab13" class="tab-pane fade"> Text Three </div>
    </div>
  </div>
</div>

来源：https://stackoverflow.com/questions/61009055/how-to-scroll-nav-pills-bootstrap-3-horizontally