Fixed Raindrops category archives issue

functions.php

// test 1
	function raindrops_category_navigation(){
		$result = '';
		$tmp_id = get_query_var( 'cat');
		$tmp_id = absint( $tmp_id );
		$sibling = '';
		
		$tmp_parent =  get_category_parents(  $tmp_id , true, ' » ' );

		if( strip_tags( $tmp_parent ) !== get_the_category_by_ID( $tmp_id ). ' » ' ) {
			
			$tmp_parent = trim( $tmp_parent ,' » ');
			$result  = str_replace(get_the_category_by_ID( $tmp_id ),'', $tmp_parent );

			$result .= sprintf( '<span class="current">%1$s</span> &raquo; ',  get_the_category_by_ID( $tmp_id ) );
		}

		$tmp_child_ids = get_term_children( $tmp_id, 'category' );
		
		foreach( $tmp_child_ids as $tmp_id ) {
			
			$term = get_term_by( 'id', $tmp_id, 'category' );
			
			if( $sibling == $term->parent ) {
				$category_separator = '|';
				$flag = 'sibling';
			} else {
				$category_separator = "&raquo;";
				$flag = 'parent';
			}
			
			$category_separator = apply_filters( 'raindrops_category_navigation_separator', $category_separator, $flag );

			$result .= " {$category_separator} ". '<a href="' . esc_url( get_term_link( $tmp_id, 'category' ) ) . '">' . esc_html( $term->name ) . "</a>";
			
			$sibling = $term->parent;
		}

		return apply_filters( 'raindrops_category_navigation', '<div class="raindrops-category-navigation">'. trim( $result,' &raquo; '). '</div>' );
	}
	//test2
		function raindrops_post_category_relation() {
		global $post;

		$result			 = array();
		$tmp_id			 = absint( get_query_var( 'cat' ) );
		$categories	     = get_the_category( $post->ID );

		foreach ( $categories as $category ) {
			$category->term_id	 = absint( $category->term_id );
			$parents			 = get_category_parents( $category->term_id, true, '&raquo;' );
			$parents_item		 = str_replace( '<a href="' . get_category_link( $category->term_id ) . '">' . $category->name . "</a>&raquo;", '', $parents );
			$parents			 = explode( '&raquo;', $parents_item );
			
			if ( ! empty( $parents_item ) ) {
				$result[] = '<span class="label title parent">'.esc_html__('Parent Category:','Raindrops' ).'</span>';
			}
			foreach ( $parents as $links ) {

				$result[] = $links;
			}

			$replace_check	 = get_the_category_by_ID( $category->term_id );
			$replace_check	 = get_category_link( $category->term_id );
			$tmp_child_ids	 = get_term_children( $category->term_id, 'category' );
			$child_result	 = '';
			$child_ready	 = array();
			if ( ! empty( $tmp_child_ids ) ) {
				$result[] = '<span class="label title child">'.esc_html__('Child Category:','Raindrops' ).'</span>';
			}
			foreach ( $tmp_child_ids as $tmp_id ) {
				
				$tmp_id		 = absint( $tmp_id );
				$term		 = get_term_by( 'id',$tmp_id , 'category' );
				$result[]	 = '<a href="' . get_term_link( $tmp_id, 'category' ) . '">' . $term->name . "</a>";
			}
		}

		$result	 = array_unique( $result );
		$result	 = implode( ' ', $result );

		return apply_filters( 'raindrops_post_category_relation', rtrim( $result, ' &raquo; ' ) );
	}
	//test3 filterによるセパレータのカスタマイズ
	
	add_filter( 'raindrops_category_navigation_separator', 'custom_category_separator', 10, 2 );

function custom_category_separator( $val, $flag ) {
	
	if( $flag == 'sibling' ){
		return '/';
	}
	return $val;
}