Tag chage with content
HTML
<ul>
<li> Paragraph.</li>
<li>HI</li>
<li> Paragraph.</li>
</ul>JavaScript
$( "li" ).css( "text-decoration", "underline" );
$( "li:contains('HI')" ).mouseenter(function() {
$( this ).replaceWith( "<div>" + $( this ).text() + "</div>" );
});