function filter_company_title(){
$argus = array('post_type' =>'st_company');
$myposts = get_posts( $argus );
echo "<select>";
foreach($myposts as $pric){
echo "<option value=\"".get_the_ID($pric)."\">".get_the_title($pric)."</option>";
}
}
echo "</select>";
add_action('restrict_manage_posts','filter_company_title');