<div class="bg-black inner_nav">
  <div class="ccontainer">
    <div class="crow g-0">
      <div class="ccol ccol-xl-4 ccol-lg-4 ccol-md-6 ccol-sm-8 mx-auto">
        <ul class="tab-links">
          <li>
            <a class="tab-link" id="about" href="about.php">About</a>
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          <li>
            <a class="tab-link active" id="service_opportunities" href="#service_opportunities">Service Opportunities</a>
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    </div>
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</div>