.art-contentLayout .art-content {
position: relative;
margin: 20px 0 0 0;
padding: 0;
border: 0;
float: right;
overflow: hidden;
width: 551px;

.art-contentLayout .art-sidebar1 {
position: static;
text-align: right;
margin: 0;
padding: 0;
border: 0;
float: left;
overflow: hidden;
width: 199px;

<div class="art-sidebar1">      
<?php if (!art_sidebar(1)): ?>
<div class="art-Block">
    <div class="art-Block-body">
<div class="art-BlockHeader">
    <div class="art-header-tag-icon">
        <div class="t"><?php _e('Поиск', 'kubrick'); ?></div>
    </div>
</div><div class="art-BlockContent">
    <div class="art-BlockContent-tl"></div>
    <div class="art-BlockContent-tr"></div>
    <div class="art-BlockContent-bl"></div>
    <div class="art-BlockContent-br"></div>
    <div class="art-BlockContent-tc"></div>
    <div class="art-BlockContent-bc"></div>
    <div class="art-BlockContent-cl"></div>
    <div class="art-BlockContent-cr"></div>
    <div class="art-BlockContent-cc"></div>
    <div class="art-BlockContent-body">
<form method="get" name="searchform" action="<?php bloginfo('url'); ?>/">
<input type="text" value="<?php the_search_query(); ?>" name="s" style="width: 95%;" />
<span class="art-button-wrapper">
   <span class="l"> </span>
   <span class="r"> </span>
   <input class="art-button" type="submit" name="search" value="<?php _e('найти', 'kubrick'); ?>"/>
</span>

</form>

    </div>
</div>

    </div>
</div>
<div class="art-Block">
   

<?php endif ?>
</div>