installation

hi everybody,

i use theme origin. i downloaded and installed wp-pagenavi plugin. i can′t find this php code

<div class=”nav-previous”><?php next_posts_link( __( ‘<span class=”meta-nav”>←</span> Older posts’, ‘twentyten’ ) ); ?></div>
<div class=”nav-next”><?php previous_posts_link( __( ‘Newer posts <span class=”meta-nav”>→</span>’, ‘twentyten’ ) ); ?></div>

please could you help me how can i fix it. thanks

https://www.ads-software.com/extend/plugins/wp-pagenavi/