ASP.net hide menu

Hi. I am trying to use VB.net to hide the following part of my page. I can't see an ID so not sure what to do. A css designer modified this part of the page

<div class="card filter-card mb-4">
    <div class="card-body">
        <div class="dropdown-button-wrapper">
            <a class="btn-dropdown dropdown-toggle d-block" data-toggle="collapse" href="#widthCollapse" role="button" aria-expanded="false" aria-controls="widthCollapse">
                                            Width
            </a>
        </div>
        <div class="collapse filter-body w-100" id="widthCollapse">
            <input class="form-control mb-3" id="Width1" runat="server" type="text" placeholder="From" />
            <input class="form-control" id="Width2" runat="server" type="text" placeholder="To" />
        </div>
    </div>
    <div class="card-body">
        <div class="dropdown-button-wrapper">
            <a class="btn-dropdown dropdown-toggle d-block" data-toggle="collapse" href="#lengthCollapse" role="button" aria-expanded="false" aria-controls="lengthCollapse">
                                            Length
            </a>
        </div>
        <div class="collapse filter-body w-100" id="lengthCollapse">
            <input class="form-control mb-3" id="Length1" runat="server" type="text" placeholder="From" />
            <input class="form-control" id="Length2" runat="server" type="text" placeholder="To"/>
        </div>
    </div>
    <div class="card-body">
        <div class="dropdown-button-wrapper">
            <a class="btn-dropdown dropdown-toggle d-block" data-toggle="collapse" href="#thicknessCollapse" role="button" aria-expanded="false" aria-controls="thicknessCollapse">
                                            Thickness
            </a>
        </div>
        <div class="collapse filter-body w-100" id="thicknessCollapse">
            <input class="form-control mb-3" id="Thickness1" runat="server" type="text" placeholder="From" />
            <input class="form-control" id="Thickness2" runat="server" type="text" placeholder="To"/>
        </div>
    </div>
    <div class="card-body">
        <div class="dropdown-button-wrapper">
            <a class="btn-dropdown dropdown-toggle d-block" data-toggle="collapse" href="#randsPerTonCollapse" role="button" aria-expanded="false" aria-controls="randsPerTonCollapse">
                                            Rands per Ton
            </a>
        </div>
        <div class="collapse filter-body w-100" id="randsPerTonCollapse">
            <input class="form-control mb-3" id="RandsPerTon1" runat="server" type="text" placeholder="From" />
            <input class="form-control" id="RandsPerTon2" runat="server" type="text" placeholder="To"/>
        </div>
    </div>
</div>

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