JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
<div class="row-fluid">         
<table style="font-size:10px">
<tbody>
<tr>
<td>
<select id="Volum">
<option value="1x ">1x </option>
<option value="2x ">2x </option>
<option value="3x ">3x </option>
<option value="4x ">4x </option> 
<option value="5x ">5x </option> 
<option value="6x ">6x</option> 
</select></td>
 <td>     
<select id="produse">
<option value="reset">Selecteaza Produs</option>
<option value="Coltare">Coltare</option> 
<option value="Seturi">Seturi</option> 
</select></td>
<td>
<select id="ModeleColtare" class="sub_select_class">
<option value="Coltar Vera">Coltar Vera</option>
<option value="Coltar Onix">Coltar Onix</option>
<option value="Coltar Olyve">Coltar Olyve</option>
<option value="Coltar Adrian">Coltar Adrian</option>
</select></td>
<td>
<select id="ModeleSeturi" class="sub_select_class">
<option value="Set Dana">Set Dana</option>
<option value="Set Ramona">Set Ramona</option>
<option value="Set Gina">Set Gina</option>
<option value="Set Olyve">Set Olyve</option>
</select></td>
<td>
Alte Detalii: <textarea rows="1" style="width:120px;"></textarea> Pret: <input type="text" size="3" /> </td>
<td>
<button id="filter" name="filter" onclick="resetFunction()">Reset</button>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
 <button id="addMore" class="btn btn-sm btn-primary"><i class="fa fa-dot-circle-o"></i> Add Row</button></div>

CSS

#ModeleColtare, #ModeleSeturi{
    display: none;
}

.new-rect {
    background: black;
    width: 100%;
    height: 30px;
}

JavaScript

$("#addMore").click(function(){   
    $(".row-fluid:last").clone().appendTo(".wrapper");  
});

$("#produse").change(function(){
    var $this = $(this), value = $this.val(); // save value
    $('.sub_select_class').hide(); // we hide every second select
    switch(value) { // we show only what needs to be visible
       case 'Canapele':
         $("#ModeleCanapele").show();
         break;
       case 'Coltare':
         $("#ModeleColtare").show();
         break;
         case 'Mobila':
         $("#ModeleMobila").show();
         break;
         case 'Fotolii':
         $("#ModeleFotolii").show();
         break;
         case 'Seturi':
         $("#ModeleSeturi").show();
         break;
       // ...etc
    }
});