Hello, I wanted to know how I can get these li's all and put only the first <ul> .
<ul>
<li>1 </li>
<li>2 </li>
<li>3</li>
<li>4 </li>
</ul>
<ul>
<li>5 </li>
<li>6 </li>
<li>7 </li>
<li>8 </li>
</ul>
<ul>
<li>9 </li>
<li>10</li>
</ul>
You can do this:
$('li').appendTo('ul:first');
In this way you leave the other ul empty.
$('li').each(function(){
$('.nova-ul').append($(this));
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><ul><li>1</li><li>2</li><li>3</li><li>4</li></ul><ul><li>5</li><li>6</li><li>7</li><li>8</li></ul><ul><li>9</li><li>10</li></ul><ulclass="nova-ul"></ul> But, as @Sergio asked, and if you want to delete the% of original% you will have to add <ul> after $('ul').not('.nova-ul').remove();