[wp-hackers] Empty link names

[Dmitry Tokmakov]

Hi all, 
I'm having the issue with wp_nav_menu function,

I have set the theme location in functions.php, created the menu, and output it in the header,
all is working fine except that all a element's name are empty:

this is the output html:

<ul id="nav-menu">
<li><a href="link..." ></a>
</li>
...
</ul>

this is very strange issue, never had it before. 
Does anybody familiar with that issue?

Thank you in advance,

Best,
Dmitry Tokmakov
Digital Spin
digitalsp.in