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    copied!<p>I've solved it by adding class "columns" where I've set columns count and drop down width. Of course you can set columns count and width depending on media queries.</p> <p><a href="https://jsfiddle.net/maciej_p/eatv1b4b/18/">https://jsfiddle.net/maciej_p/eatv1b4b/18/</a></p> <p>HTML:</p> <pre><code>&lt;li class="dropdown"&gt; &lt;a href="#" class="dropdown-toggle" data-toggle="dropdown"&gt;wybierz region&lt;b class="caret"&gt;&lt;/b&gt;&lt;/a&gt; &lt;ul class="dropdown-menu columns"&gt; &lt;li&gt;&lt;a href="#"&gt;&lt;strong&gt;Górny Śląsk&lt;/strong&gt;&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat będziński&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat bielski&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat bieruńsko-lędziński&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat cieszyński&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat częstochowski&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat gliwicki&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat kłobucki&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat lubliniecki&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat mikołowski&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="#"&gt;powiat myszkowski&lt;/a&gt;&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; </code></pre> <p>CSS:</p> <pre><code>@media screen and (max-width: 991px){ .columns{ height: 200px; overflow-y:scroll; } } @media screen and (min-width: 992px){ .columns{ -moz-column-count:2; /* Firefox */ -webkit-column-count:2; /* Safari and Chrome */ column-count:2; width: 500px; height:170px; } } </code></pre>
 

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