Usuń cały <ul>...</ul> z szablonu header.
header
<ul>
<li style="background: url(../../../banner.png);"></li>
<li style="background: url(../../../banner.png);"></li>
<li style="background: url(../../../banner.png);"></li>
<li style="background: url(../../../banner.png);"></li>
</ul>
