Add to the style.css (http://deks.org.rs/sanunis/wp-content/themes/nisarg/style.css) of your theme the following:
.category h3.archive-page-title {
display: none;
}
Add to the style.css (http://deks.org.rs/sanunis/wp-content/themes/nisarg/style.css) of your theme the following:
.category h3.archive-page-title {
display: none;
}