Show elements depending on html value of a tag
<p>I would like to accomplish the following with jquery : </p>

<p>When I click on this link </p>

<pre><code>&lt;a href="#"&gt;Cars&lt;/a&gt;
</code></pre>

<p>I would like all divs like those </p>

<pre><code>&lt;div class="product"&gt;
    &lt;div class="category"&gt;Cars&lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>to do something.</p>

<p>You get the idea, I have a menu with a list of categories, and a list of products, each containing a div with the category name, and I would like to make them hide/show.</p>
