contentLoader.js

$(function() {  
  $("[data-plan]").each(function(i, item) {    
      var $item = $(item),
		  table = $item.parents("table"),
	      tableRows = table.find("tr"),
		  templateRow = tableRows.last().clone(),
		  columnIndex = $item.siblings().andSelf().index($item),
		  currentRowIndex = tableRows.index($item.parents("tr")) + 1;
		        	
	  var produtos = conteudo[ $item.data("plan") ];
	  for(var produto in produtos) {
		if (currentRowIndex >= tableRows.length - 1) {
		  table.append(templateRow.clone());
		  tableRows = table.find("tr");
		}
		
		tableRows.eq(currentRowIndex).find("td:eq(" + columnIndex + ")").html(produtos[produto]);
		currentRowIndex++;
	  }	 	 
  });
  
  $("table:has([data-plan])").each(function(i, item) {
	$(item).find("tr").last().remove();
  });
});

pagina.html

<p>&nbsp;</p>
<br />
<h2 class="headingA01">SHOP MUSIC TEO</h2>
<p>AV SINDONIO OTONI, 640 - MG<br /> TEOFILO OTONI</p>
<p>&nbsp;</p>
<table border="1" cellspacing="0" cellpadding="10" width="100%">
<tbody>
<tr>
<td colspan="4">Instrumentos Musicais</td>
</tr>
<tr>
<td width="25%" bgcolor="#CCCCCC" data-plan="teclado"><strong>Teclado e Piano Port&aacute;til</strong></td>
<td width="25%" bgcolor="#CCCCCC"><strong>Guitarra, Contrabaixo e Amplificador</strong></td>
<td width="25%" bgcolor="#CCCCCC"><strong>Bateria Eletr&ocirc;nica DTX</strong></td>
<td width="25%" bgcolor="#CCCCCC" data-plan="sopro"><strong>Sopros</strong></td>
</tr>
<tr>
<td width="25%"></td>
<td width="25%"></td>
<td width="25%"></td>
<td width="25%"></td>
</tr>
</tbody>
</table>
<p>&nbsp;</p>
<table border="1" cellspacing="0" cellpadding="10" width="50%">
<tbody>
<tr>
<td colspan="2">Standard &Aacute;udio</td>
</tr>
<tr>
<td width="25%" bgcolor="#CCCCCC"><strong>Digital Mixer</strong></td>
<td width="25%" bgcolor="#CCCCCC" data-plan="mixer"><strong>MG/MGP Mixer</strong></td>
</tr>
<tr>
<td width="25%"></td>
<td width="25%"></td>
</tr>
</tbody>
</table>

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="plans.js"></script>
<script src="contentLoader.js"></script>

plans.js

var conteudo = {
  teclado: [ "PSR-E243", "PSR-E423" ],
  sopro: [ "YSL-354", "YSL-3335", "YTR-2330", "YFL-211" ],
  mixer: [ "MG82CX", "MG102C / C-R", "MG124CX-R", "MG166C / USB", "MG166CX / USB", "MG206C / USB", "MG24/14FX", "MG32/14FX", "MGP12X", "MGP16X", "MGP24X", "MGP32X", "Serie EMX", "Serie STAGEPAS"]
}