Error Number 1054 - Unknown column 'text_content_' in 'field list'

[eluser]yuro[/eluser]
hello,

my problem is not finished. The columns in the database are existing. But he says that are unknown column.

Code:

$this->db->select("text_content_".$this->session->userdata('web_lang')." AS text_content, menu.menu_name_".$this->session->userdata('web_lang')." AS menu_name,banner");
....
$query = $this->db->get();

What do I have for an alternative maybe?