For the side bar URLs, that's because you're using joomla menu items.
Instead, you should create a hikashop module to display your categories (you should be able to achieve the same styling) and set the menu you're using on your home page in the "menu" option of that module. That way, it will produce the same URLs.
For the breadcrumb URL, that's because your categories name are in russian and we didn't do the modification to properly support UTF8 in the URLs of the breadcrumb.
You should edit the file components/com_hikashop/views/category/view.html.php via FTP and replace the line:
$pathway->addItem($category->category_name,hikashop_completeLink('category&task=listing&cid='.(int)$category->category_id.'&name='.strtolower(preg_replace('#[^a-z0-9-_]#i','',$category->category_name)).$menu_id));
by the code:
if(method_exists($app,'stringURLSafe')){
$alias = $app->stringURLSafe($category->category_name);
}else{
$alias = JFilterOutput::stringURLSafe($category->category_name);
}
$pathway->addItem($category->category_name,hikashop_completeLink('category&task=listing&cid='.(int)$category->category_id.'&name='.$alias.$menu_id));