Hello, in my menu, which displays the items from a single category, when i insert more news, for example 12 articlees, I get this warning at the bottom of my site:

Warning: Illegal string offset 'active' in /pf2014/templates/jf_texturia/html/pagination.php on line 90


link: pomorskafabrykadesignu.eu/index.php/news/wideogaleria

what joomla version are you using?

3.2.4

you should try to remove /pf2014/templates/jf_texturia/html/pagination.php file.
I think this file is only for joomla 1.5

helped, but the links to the other pages in menu are displayed vertical, not horizontal

add below code to bottom of templates/jf_texturia/css/template.css

.pagination ul {
list-style: none outside none;
margin: 0;
padding: 0;
}

.pagination ul li {
float: left;
}
.pagination span, .pagination a{
background:none !important;
padding: 0 8px;
width: auto !important;
}